SymbolicRegions may also be live roots.

llvm-svn: 70380
diff --git a/clang/lib/Analysis/RegionStore.cpp b/clang/lib/Analysis/RegionStore.cpp
index 7a78036..aeb8a2a 100644
--- a/clang/lib/Analysis/RegionStore.cpp
+++ b/clang/lib/Analysis/RegionStore.cpp
@@ -912,6 +912,10 @@
     if (const VarRegion* VR = dyn_cast<VarRegion>(R)) {
       if (SymReaper.isLive(Loc, VR->getDecl()))
         RegionRoots.push_back(VR); // This is a live "root".
+    } 
+    else if (const SymbolicRegion* SR = dyn_cast<SymbolicRegion>(R)) {
+      if (SymReaper.isLive(SR->getSymbol()))
+        RegionRoots.push_back(SR);
     }
     else {
       // Get the super region for R.