Change references to 'const ProgramState *' to typedef 'ProgramStateRef'.

At this point this is largely cosmetic, but it opens the door to replace
ProgramStateRef with a smart pointer that more eagerly acts in the role
of reclaiming unused ProgramState objects.

llvm-svn: 149081
diff --git a/clang/lib/StaticAnalyzer/Checkers/CastSizeChecker.cpp b/clang/lib/StaticAnalyzer/Checkers/CastSizeChecker.cpp
index 32b60d9..603343d 100644
--- a/clang/lib/StaticAnalyzer/Checkers/CastSizeChecker.cpp
+++ b/clang/lib/StaticAnalyzer/Checkers/CastSizeChecker.cpp
@@ -44,7 +44,7 @@
   if (ToPointeeTy->isIncompleteType())
     return;
 
-  const ProgramState *state = C.getState();
+  ProgramStateRef state = C.getState();
   const MemRegion *R = state->getSVal(E, C.getLocationContext()).getAsRegion();
   if (R == 0)
     return;