Privatize the first of the value maps.

llvm-svn: 76634
diff --git a/llvm/lib/VMCore/LLVMContext.cpp b/llvm/lib/VMCore/LLVMContext.cpp
index 5e009ea..782a87b 100644
--- a/llvm/lib/VMCore/LLVMContext.cpp
+++ b/llvm/lib/VMCore/LLVMContext.cpp
@@ -167,7 +167,7 @@
 
 // ConstantAggregateZero accessors.
 ConstantAggregateZero* LLVMContext::getConstantAggregateZero(const Type* Ty) {
-  return ConstantAggregateZero::get(Ty);
+  return pImpl->getConstantAggregateZero(Ty);
 }
 
 
@@ -649,3 +649,7 @@
 void LLVMContext::erase(MDNode *M) {
   pImpl->erase(M);
 }
+
+void LLVMContext::erase(ConstantAggregateZero *Z) {
+  pImpl->erase(Z);
+}
\ No newline at end of file