[commit] Fix unitialized warning in macroexp.c

[Thiago Jung Bauermann <bauerman@br.ibm.com>]

Hi,

When compiling with -O3 (gcc 4.4.5), the build fails with:

cc1: warnings being treated as errors
/home/bauermann/trabalho/src/src/gdb/macroexp.c: In function ‘maybe_expand’:
/home/bauermann/trabalho/src/src/gdb/macroexp.c:1186: error: ‘va_arg_name.len’ may be used uninitialized in this function
/home/bauermann/trabalho/src/src/gdb/macroexp.c:1186: note: ‘va_arg_name.len’ was declared here
/home/bauermann/trabalho/src/src/gdb/macroexp.c:1186: error: ‘va_arg_name.text’ may be used uninitialized in this function
/home/bauermann/trabalho/src/src/gdb/macroexp.c:1186: note: ‘va_arg_name.text’ was declared here
make: *** [macroexp.o] Error 1

I committed the following patch to fix the build.
-- 
[]'s
Thiago Jung Bauermann
IBM Linux Technology Center


2011-03-31  Thiago Jung Bauermann  <bauerman@br.ibm.com>

	* macroexp.c (expand): Avoid uninitialized variable
	compiler warning.

Index: macroexp.c
===================================================================
RCS file: /cvs/src/src/gdb/macroexp.c,v
retrieving revision 1.26
diff -u -r1.26 macroexp.c
--- macroexp.c	9 Jan 2011 03:20:33 -0000	1.26
+++ macroexp.c	31 Mar 2011 15:39:41 -0000
@@ -1183,7 +1183,7 @@
       struct macro_buffer *argv = NULL;
       struct macro_buffer substituted;
       struct macro_buffer substituted_src;
-      struct macro_buffer va_arg_name;
+      struct macro_buffer va_arg_name = {0};
       int is_varargs = 0;
 
       if (def->argc >= 1)