minor code cleanup


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@70361 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaChecking.cpp b/lib/Sema/SemaChecking.cpp
index 8e3a421..7d54dc0 100644
--- a/lib/Sema/SemaChecking.cpp
+++ b/lib/Sema/SemaChecking.cpp
@@ -629,10 +629,10 @@
   }
 
   // Str - The format string.  NOTE: this is NOT null-terminated!
-  const char * const Str = FExpr->getStrData();
+  const char *Str = FExpr->getStrData();
 
   // CHECK: empty format string?
-  const unsigned StrLen = FExpr->getByteLength();
+  unsigned StrLen = FExpr->getByteLength();
   
   if (StrLen == 0) {
     Diag(FExpr->getLocStart(), diag::warn_printf_empty_format_string)