Look through vector types when determining the base type of a type for declarator printing. Bug found via the PCH tester

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@74672 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/DeclPrinter.cpp b/lib/AST/DeclPrinter.cpp
index ca25ed2..12e89cd 100644
--- a/lib/AST/DeclPrinter.cpp
+++ b/lib/AST/DeclPrinter.cpp
@@ -96,6 +96,8 @@
       BaseType = ATy->getElementType();
     else if (const FunctionType* FTy = BaseType->getAsFunctionType())
       BaseType = FTy->getResultType();
+    else if (const VectorType *VTy = BaseType->getAsVectorType())
+      BaseType = VTy->getElementType();
     else
       assert(0 && "Unknown declarator!");
   }