Fix unit tests for ModuleLoader change in r168961.

llvm-svn: 168962
diff --git a/clang/unittests/Lex/PreprocessingRecordTest.cpp b/clang/unittests/Lex/PreprocessingRecordTest.cpp
index 6056d55..2bf0048 100644
--- a/clang/unittests/Lex/PreprocessingRecordTest.cpp
+++ b/clang/unittests/Lex/PreprocessingRecordTest.cpp
@@ -54,10 +54,11 @@
 };
 
 class VoidModuleLoader : public ModuleLoader {
-  virtual Module *loadModule(SourceLocation ImportLoc, ModuleIdPath Path,
-                             Module::NameVisibilityKind Visibility,
-                             bool IsInclusionDirective) {
-    return 0;
+  virtual ModuleLoadResult loadModule(SourceLocation ImportLoc, 
+                                      ModuleIdPath Path,
+                                      Module::NameVisibilityKind Visibility,
+                                      bool IsInclusionDirective) {
+    return ModuleLoadResult();
   }
 };