fix a warning in optimized build


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23030 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/IA64/IA64ISelPattern.cpp b/lib/Target/IA64/IA64ISelPattern.cpp
index cb81521..c0af342 100644
--- a/lib/Target/IA64/IA64ISelPattern.cpp
+++ b/lib/Target/IA64/IA64ISelPattern.cpp
@@ -569,7 +569,7 @@
   }
 
   std::string t, u;
-  int c;
+  int c = 0;
   bool f;
   std::map<const int, int> w;