Support undefined dependent bases.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@148775 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/CFG.cpp b/lib/Analysis/CFG.cpp
index 7b84710..c760d49 100644
--- a/lib/Analysis/CFG.cpp
+++ b/lib/Analysis/CFG.cpp
@@ -750,13 +750,12 @@
   // Before virtual bases destroy direct base objects.
   for (CXXRecordDecl::base_class_const_iterator BI = RD->bases_begin(),
       BE = RD->bases_end(); BI != BE; ++BI) {
-    if (!BI->isVirtual()) {
-      const CXXRecordDecl *CD = BI->getType()->getAsCXXRecordDecl();
-      if (!CD->hasTrivialDestructor()) {
-        autoCreateBlock();
-        appendBaseDtor(Block, BI);
-      }
-    }
+    if (!BI->isVirtual())
+      if (const CXXRecordDecl *CD = BI->getType()->getAsCXXRecordDecl())
+        if (!CD->hasTrivialDestructor()) {
+          autoCreateBlock();
+          appendBaseDtor(Block, BI);
+        }
   }
 
   // First destroy member objects.