[patch] make older gcc happy mips-tdep.c

[Andreas Tobler <andreast-list@fgznet.ch>]

Hello,

while trying to build a gdb with --enable-targets=all I found the below.

The warning is about 'branch_bp might be uninitialized...'

I compile this on FreeBSD where the system compiler is gcc-4.2.1.

Is the below ok to commit?

TIA,
Andreas

2012-12-19  Andreas Tobler  <andreast@neon.andreas.nets>

	* mips-tdep.c (mips_deal_with_atomic_sequence): Initialize
	branch_bp to keep gcc happy.

Index: mips-tdep.c
===================================================================
RCS file: /cvs/src/src/gdb/mips-tdep.c,v
retrieving revision 1.564
diff -u -r1.564 mips-tdep.c
--- mips-tdep.c 12 Nov 2012 21:59:07 -0000      1.564
+++ mips-tdep.c 19 Dec 2012 17:51:35 -0000
@@ -3695,7 +3695,8 @@
 {
   CORE_ADDR breaks[2] = {-1, -1};
   CORE_ADDR loc = pc;
-  CORE_ADDR branch_bp; /* Breakpoint at branch instruction's
destination.  */
+  CORE_ADDR branch_bp = 0; /* Breakpoint at branch instruction's
+                             destination.  */
   ULONGEST insn;
   int insn_count;
   int index;