Avoid error output from ls.

Rev: src/precompile.sh.in:1.18

src/precompile.sh.in

@@ -10,12 +10,12 @@ shift 1
 INPUT="`eval echo \"\\$$#\"`"
 TMPOUTPUT="${INPUT}.compiled"
 
-if [ -f "$TMPOUTPUT" -a \
-     "`ls -1t $TMPOUTPUT $INPUT $SCRIPT | head -1`" = "`ls -1t $TMPOUTPUT`" \
-   ]; then
+if [ -f "$TMPOUTPUT" ]; then
+  if [ "`ls -1t $TMPOUTPUT $INPUT $SCRIPT | head -1`" = "`ls -1t $TMPOUTPUT`" ]; then
     cat "$TMPOUTPUT" >&5
     exit 0
   fi
+fi
 
 TMP_BUILDDIR="@BUILDDIR@"
 TMP_BINDIR="@BINDIR@"