(convert_filename): Don't start looking for '.' until after last

directory separator.

From-SVN: r12724

gcc/gcc.c

@@ -2131,7 +2131,11 @@ convert_filename (name, do_exe)
   if (! do_exe || EXECUTABLE_SUFFIX[0] == 0 || (len == 2 && name[0] == '-'))
     return name;
 
-  for (i = 0; i < len; i++)
+  for (i = len - 1; i >= 0; i--)
+    if (name[i] == '/' || name[i] == DIR_SEPARATOR)
+      break;
+
+  for (i++; i < len; i++)
     if (name[i] == '.')
       return name;