ASTNodeImporter - fix uninitialized variable warnings. NFCI.

llvm-svn: 361096
diff --git a/clang/lib/AST/ASTImporter.cpp b/clang/lib/AST/ASTImporter.cpp
index b7380aa..74a1887 100644
--- a/clang/lib/AST/ASTImporter.cpp
+++ b/clang/lib/AST/ASTImporter.cpp
@@ -5325,7 +5325,7 @@
       return ImportedDefOrErr.takeError();
   }
 
-  VarTemplateDecl *VarTemplate;
+  VarTemplateDecl *VarTemplate = nullptr;
   if (Error Err = importInto(VarTemplate, D->getSpecializedTemplate()))
     return std::move(Err);
 
@@ -8010,7 +8010,7 @@
 
   while (!NestedNames.empty()) {
     NNS = NestedNames.pop_back_val();
-    NestedNameSpecifier *Spec;
+    NestedNameSpecifier *Spec = nullptr;
     if (Error Err = importInto(Spec, NNS.getNestedNameSpecifier()))
       return std::move(Err);