--- xpdf/XOutputDev.cc.orig	Wed Jul  1 22:54:59 1998
+++ xpdf/XOutputDev.cc	Wed Jul  1 22:56:09 1998
@@ -275,7 +275,7 @@
       // rendering the font.  This code tries to guess by looking at the
       // width of the character 'm' (which breaks if the font is a
       // subset that doesn't contain 'm').
-      if (w1 > 1.1 * w2 || w1 < 0.9 * w2) {
+      if (w1 > 0 && (w1 > 1.1 * w2 || w1 < 0.9 * w2)) {
 	w1 /= w2;
 	mat11 *= w1;
 	mat12 *= w1;