* diagnostic.c (init_output_buffer): Handle case of null PREFIX.

From-SVN: r32112

gcc/ChangeLog

+Wed Feb 23 07:26:27 2000  Richard Kenner  <kenner@vlsi1.ultra.nyu.edu>
+
+	* diagnostic.c (init_output_buffer): Handle case of null PREFIX.
+
 2000-02-23  Zack Weinberg  <zack@wolery.cumb.org>
 
 	* config/i386/i386.h: If IN_TARGET_LIBS is defined, make

gcc/diagnostic.c

@@ -152,7 +152,7 @@ init_output_buffer (buffer, prefix, max_length)
      char *prefix;
      int max_length;
 {
-  int prefix_length = strlen (prefix);
+  int prefix_length = prefix == 0 ? 0 : strlen (prefix);
 
   obstack_init (&buffer->obstack);
   buffer->prefix = prefix;