SymbolicRegions really have unknown sizes.

llvm-svn: 63929
diff --git a/clang/lib/Analysis/RegionStore.cpp b/clang/lib/Analysis/RegionStore.cpp
index 93b5525..66aabcb 100644
--- a/clang/lib/Analysis/RegionStore.cpp
+++ b/clang/lib/Analysis/RegionStore.cpp
@@ -481,9 +481,7 @@
     return UnknownVal();
   }
 
-  if (const SymbolicRegion* SR = dyn_cast<SymbolicRegion>(R)) {
-    // FIXME: Unsupported yet.
-    SR = 0;
+  if (isa<SymbolicRegion>(R)) {
     return UnknownVal();
   }