1 files changed, 49 insertions, 25 deletions
diff --git a/Master/texmf-dist/tex/latex/cleveref/cleveref.sty b/Master/texmf-dist/tex/latex/cleveref/cleveref.sty
index ed7c5767975..990c9e2c949 100644
--- a/Master/texmf-dist/tex/latex/cleveref/cleveref.sty
+++ b/Master/texmf-dist/tex/latex/cleveref/cleveref.sty
@@ -22,7 +22,7 @@
 %% version 1999/12/01 or later.
 \NeedsTeXFormat{LaTeX2e}[1999/12/01]
 \ProvidesPackage{cleveref}
- [2011/01/10 v0.17.7 Intelligent cross-referencing]
+ [2011/01/19 v0.17.8 Intelligent cross-referencing]
 %% \CharacterTable
 %%  {Upper-case    \A\B\C\D\E\F\G\H\I\J\K\L\M\N\O\P\Q\R\S\T\U\V\W\X\Y\Z
 %%   Lower-case    \a\b\c\d\e\f\g\h\i\j\k\l\m\n\o\p\q\r\s\t\u\v\w\x\y\z
@@ -2187,36 +2187,54 @@
 \def\@othm#1[#2]#3{%
   \edef\@tmpa{\expandafter\noexpand%
     \csname cref@#1@name@preamble\endcsname}%
-  \expandafter\expandafter\expandafter\gdef\expandafter%
-  \@tmpa\expandafter{\MakeLowercase #3}%
-  \edef\@tmpa{\expandafter\noexpand%
-    \csname Cref@#1@name@preamble\endcsname}%
-  \expandafter\expandafter\expandafter\gdef\expandafter%
-  \@tmpa\expandafter{\MakeUppercase #3}%
+  \edef\@tmpb{\expandafter\noexpand%
+      \csname Cref@#1@name@preamble\endcsname}%
+  \def\@tmpc{#3}%
+  \ifx\@tmpc\@empty\relax%
+    \expandafter\gdef\@tmpa{}%
+    \expandafter\gdef\@tmpb{}%
+  \else%
+    \expandafter\expandafter\expandafter\gdef\expandafter%
+      \@tmpa\expandafter{\MakeLowercase #3}%
+    \expandafter\expandafter\expandafter\gdef\expandafter%
+      \@tmpa\expandafter{\MakeUppercase #3}%
+  \fi%
   \cref@stack@add{#1}{\cref@label@types}%
   \cref@old@othm{#1}[#2]{#3}}
 \let\cref@old@xnthm\@xnthm
 \def\@xnthm#1#2[#3]{%
   \edef\@tmpa{\expandafter\noexpand%
     \csname cref@#1@name@preamble\endcsname}%
-  \expandafter\expandafter\expandafter\gdef\expandafter%
-  \@tmpa\expandafter{\MakeLowercase #2}%
-  \edef\@tmpa{\expandafter\noexpand%
-    \csname Cref@#1@name@preamble\endcsname}%
-  \expandafter\expandafter\expandafter\gdef\expandafter%
-  \@tmpa\expandafter{\MakeUppercase #2}%
+  \edef\@tmpb{\expandafter\noexpand%
+      \csname Cref@#1@name@preamble\endcsname}%
+  \def\@tmpc{#2}%
+  \ifx\@tmpc\@empty\relax%
+    \expandafter\gdef\@tmpa{}%
+    \expandafter\gdef\@tmpb{}%
+  \else%
+    \expandafter\expandafter\expandafter\gdef\expandafter%
+      \@tmpa\expandafter{\MakeLowercase #2}%
+    \expandafter\expandafter\expandafter\gdef\expandafter%
+      \@tmpa\expandafter{\MakeUppercase #2}%
+  \fi%
   \cref@stack@add{#1}{\cref@label@types}%
   \cref@old@xnthm{#1}{#2}[#3]}
 \let\cref@old@ynthm\@ynthm
 \def\@ynthm#1#2{%
   \edef\@tmpa{\expandafter\noexpand%
     \csname cref@#1@name@preamble\endcsname}%
-  \expandafter\expandafter\expandafter\gdef\expandafter%
-  \@tmpa\expandafter{\MakeLowercase #2}%
-  \edef\@tmpa{\expandafter\noexpand%
-    \csname Cref@#1@name@preamble\endcsname}%
-  \expandafter\expandafter\expandafter\gdef\expandafter%
-  \@tmpa\expandafter{\MakeUppercase #2}%
+  \edef\@tmpb{\expandafter\noexpand%
+      \csname Cref@#1@name@preamble\endcsname}%
+  \def\@tmpc{#2}%
+  \ifx\@tmpc\@empty\relax%
+    \expandafter\gdef\@tmpa{}%
+    \expandafter\gdef\@tmpb{}%
+  \else%
+    \expandafter\expandafter\expandafter\gdef\expandafter%
+      \@tmpa\expandafter{\MakeLowercase #2}%
+    \expandafter\expandafter\expandafter\gdef\expandafter%
+      \@tmpa\expandafter{\MakeUppercase #2}%
+  \fi%
   \cref@stack@add{#1}{\cref@label@types}%
   \cref@old@ynthm{#1}{#2}}
   \@ifpackageloaded{amsthm}{%
@@ -2246,12 +2264,18 @@
 \def\@ynthm#1[#2]#3{%
   \edef\@tmpa{\expandafter\noexpand%
     \csname cref@#1@name@preamble\endcsname}%
-  \expandafter\expandafter\expandafter\gdef\expandafter%
-  \@tmpa\expandafter{\MakeLowercase #3}%
-  \edef\@tmpa{\expandafter\noexpand%
-    \csname Cref@#1@name@preamble\endcsname}%
-  \expandafter\expandafter\expandafter\gdef\expandafter%
-  \@tmpa\expandafter{\MakeUppercase #3}%
+  \edef\@tmpb{\expandafter\noexpand%
+      \csname Cref@#1@name@preamble\endcsname}%
+  \def\@tmpc{#3}%
+  \ifx\@tmpc\@empty\relax%
+    \expandafter\gdef\@tmpa{}%
+    \expandafter\gdef\@tmpb{}%
+  \else%
+    \expandafter\expandafter\expandafter\gdef\expandafter%
+      \@tmpa\expandafter{\MakeLowercase #3}%
+    \expandafter\expandafter\expandafter\gdef\expandafter%
+      \@tmpa\expandafter{\MakeUppercase #3}%
+  \fi%
   \cref@stack@add{#1}{\cref@label@types}%
   \ifx\relax#2\relax%
     \def\@tempa{\@oparg{\@xthm{#1}{#3}}[]}%