[commit] Fix build error due to uninitialized variable warning

[Ulrich Weigand]

Hello,

as of commit a5fdf78a4402341a0ae23a5ca8a63825e2b5286c, building GDB with
a GCC 4.1 host compiler fails with:
    
gdb/cp-namespace.c: In function 'cp_lookup_symbol_via_imports':
gdb/cp-namespace.c:482: warning: 'sym.block' may be used uninitialized in this function
    
Apparently, more recent compilers are able to deduce that no actual
uninitialized use of sym.block takes place, but GCC 4.1 isn't yet
able to do that.
    
Fixed by adding an explicit initalization.

Bye,
Ulrich

ChangeLog:

    	* cp-namespace.c (cp_lookup_symbol_via_imports): Fix uninitialized
    	variable warning with some compilers.

diff --git a/gdb/cp-namespace.c b/gdb/cp-namespace.c
index aa29c92..f5f4bad 100644
--- a/gdb/cp-namespace.c
+++ b/gdb/cp-namespace.c
@@ -485,6 +485,7 @@ cp_lookup_symbol_via_imports (const char *scope,
   struct cleanup *searched_cleanup;
 
   sym.symbol = NULL;
+  sym.block = NULL;
 
   /* First, try to find the symbol in the given namespace if requested.  */
   if (search_scope_first)
-- 
  Dr. Ulrich Weigand
  GNU/Linux compilers and toolchain
  Ulrich.Weigand@de.ibm.com