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diff -ur dvi2tty-5.3.4.orig/dvistuff.c dvi2tty-5.3.4/dvistuff.c
--- dvi2tty-5.3.4.orig/dvistuff.c 2010-11-13 16:35:19.000000000 +0100
+++ dvi2tty-5.3.4/dvistuff.c 2011-01-26 11:35:56.526064435 +0100
@@ -441,7 +441,7 @@
while ((opcode = (int) get1()) != EOP) { /* process page until eop */
if (opcode <= LASTCHAR)
- dochar((char) opcode);
+ dochar((unsigned char) opcode);
else if ((opcode >= FONT_00) && (opcode <= FONT_63))
setfont((long) opcode - FONT_00);
else if (opcode > POST_POST)
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