C++ PATCH: Fix broken check-in from yesterday

[Mark Mitchell]

This patch fixes my check-in yesterday which used a global variable
that was not declared.  I wanted to declare it in the right place,
but forgot to check in that bit.  Sorry!

Tested on i686-pc-linux-gnu, applied on the mainline.

-- 
Mark Mitchell                   mark@codesourcery.com
CodeSourcery, LLC               http://www.codesourcery.com

2002-12-31  Mark Mitchell  <mark@codesourcery.com>

	* c-common.h (pending_lang_change): Declare.

Index: c-common.h
===================================================================
RCS file: /cvs/gcc/gcc/gcc/c-common.h,v
retrieving revision 1.164
diff -c -p -r1.164 c-common.h
*** c-common.h	1 Dec 2002 17:51:44 -0000	1.164
--- c-common.h	31 Dec 2002 17:31:48 -0000
*************** extern const char *init_c_lex			PARAMS (
*** 1235,1240 ****
--- 1235,1244 ----
  
  extern void cb_register_builtins		PARAMS ((cpp_reader *));
  
+ /* Positive if an implicit `extern "C"' scope has just been entered;
+    negative if such a scope has just been exited.  */
+ extern int pending_lang_change;
+ 
  /* Information recorded about each file examined during compilation.  */
  
  struct c_fileinfo