Add some seemingly unnecessary initialisations to shut GCC 4.0.2 up.



git-svn-id: svn://svn.valgrind.org/valgrind/trunk@7148 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/helgrind/hg_main.c b/helgrind/hg_main.c
index 18f71e0..dc02f3d 100644
--- a/helgrind/hg_main.c
+++ b/helgrind/hg_main.c
@@ -2686,7 +2686,7 @@
    while (HG_(nextIterFM)( map_shmem,
                            (Word*)(HChar*)&smga, (Word*)(HChar*)&sm )) {
       SecMapIter itr;
-      UInt*      w32p;
+      UInt*      w32p = NULL;
       Bool       mbHasShared = False;
       Bool       allNoAccess = True;
       if (!is_sane_SecMap(sm)) BAD("1");
@@ -4998,7 +4998,7 @@
      Addr       ga;
      SecMap*    sm;
      SecMapIter itr;
-     UInt*      w32p;
+     UInt*      w32p = NULL;
 
      HG_(initIterFM)( map_shmem );
      while (HG_(nextIterFM)( map_shmem,
@@ -5668,7 +5668,7 @@
    while (HG_(nextIterFM)( map_shmem,
                            (Word*)(HChar*)&ga, (Word*)(HChar*)&sm )) {
       SecMapIter itr;
-      UInt*      w32p;
+      UInt*      w32p = NULL;
       tl_assert(sm);
       stats_SMs++;
       /* Skip this SecMap if the summary bit indicates it is safe to