objc-act.c (objc_init): Return immediately if filename is NULL.

	* objc/objc-act.c (objc_init): Return immediately if filename
	is NULL.

From-SVN: r55853

gcc/ChangeLog

+2002-07-30  Neil Booth  <neil@daikokuya.co.uk>
+
+	* objc/objc-act.c (objc_init): Return immediately if filename
+	is NULL.
+
 2002-07-29  Eric Christopher  <echristo@redhat.com>
 
        	* config/mips/elf.h: Remove ecoff.h and gofast includes.

gcc/objc/objc-act.c

@@ -464,6 +464,8 @@ objc_init (filename)
      const char *filename;
 {
   filename = c_objc_common_init (filename);
+  if (filename == NULL)
+    return filename;
 
   /* Force the line number back to 0; check_newline will have
      raised it to 1, which will make the builtin functions appear