Strings are NULL terminated. So the region size should plus one.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@59943 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/RegionStore.cpp b/lib/Analysis/RegionStore.cpp
index 73b2595..99c225f 100644
--- a/lib/Analysis/RegionStore.cpp
+++ b/lib/Analysis/RegionStore.cpp
@@ -275,7 +275,7 @@
     const StringLiteral* Str = SR->getStringLiteral();
     // We intentionally made the size value signed because it participates in 
     // operations with signed indices.
-    return NonLoc::MakeVal(getBasicVals(), Str->getByteLength(), false);
+    return NonLoc::MakeVal(getBasicVals(), Str->getByteLength() + 1, false);
   }
 
   if (const AnonTypedRegion* ATR = dyn_cast<AnonTypedRegion>(R)) {