texi2dvi: Avoid spurious warnings from sed

[Akim Demaille]

Index: ChangeLog
from  Akim Demaille  <address@hidden>

        * util/texi2dvi (generated_files_get): Skip nonexistent files
        earlier.

Index: util/texi2dvi
===================================================================
RCS file: /cvsroot/texinfo/texinfo/util/texi2dvi,v
retrieving revision 1.71
diff -u -u -r1.71 texi2dvi
--- util/texi2dvi 9 Jan 2006 09:49:23 -0000 1.71
+++ util/texi2dvi 17 Jan 2006 11:25:20 -0000
@@ -524,6 +524,8 @@
   ) |
   # Depending on these files, infer outputs from other tools.
   while read file; do
+    test -f $file ||
+      continue
     echo $file
     case $language in
       (texinfo)
@@ -543,7 +545,7 @@
   done |
   # Filter existing files matching the criterion.
   while read file; do
-    if test -f $file && $filter $file; then
+    if $filter $file; then
       echo $file
     fi
   done |