Fix (invalid) may-be-uninitialized warning.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@92828 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGVtable.cpp b/lib/CodeGen/CGVtable.cpp
index 2cb877b..c04a8fa 100644
--- a/lib/CodeGen/CGVtable.cpp
+++ b/lib/CodeGen/CGVtable.cpp
@@ -1490,7 +1490,8 @@
       return;
   }
 
-  llvm::GlobalVariable::LinkageTypes Linkage;
+  llvm::GlobalVariable::LinkageTypes Linkage =
+    llvm::GlobalVariable::InternalLinkage;
   if (RD->isInAnonymousNamespace() || !RD->hasLinkage())
     Linkage = llvm::GlobalVariable::InternalLinkage;
   else if (KeyFunction && !MD->isInlined()) {