It's unnecessary to check for unknown at this point.

llvm-svn: 89437
diff --git a/clang/lib/Analysis/GRExprEngine.cpp b/clang/lib/Analysis/GRExprEngine.cpp
index 8cc6ff9..8f912c4 100644
--- a/clang/lib/Analysis/GRExprEngine.cpp
+++ b/clang/lib/Analysis/GRExprEngine.cpp
@@ -1278,8 +1278,7 @@
                                 ExplodedNode* Pred,
                                 const GRState* state, SVal location,
                                 const void *tag, bool isLoad) {
-
-  if (location.isUnknown() || Checkers.empty()) {
+  if (Checkers.empty()) {
     Dst.Add(Pred);
     return;
   }