Add a missing ~ (dtor became ctor) which caused crashes on a bunch of stuff.

llvm-svn: 52374
diff --git a/llvm/lib/Linker/LinkModules.cpp b/llvm/lib/Linker/LinkModules.cpp
index 27c71b1..e9b712f 100644
--- a/llvm/lib/Linker/LinkModules.cpp
+++ b/llvm/lib/Linker/LinkModules.cpp
@@ -83,9 +83,12 @@
 class LinkerTypeMap : public AbstractTypeUser {
   typedef DenseMap<const Type*, PATypeHolder> TheMapTy;
   TheMapTy TheMap;
-public:
   
-  LinkerTypeMap() {
+  LinkerTypeMap(const LinkerTypeMap&); // DO NOT IMPLEMENT
+  void operator=(const LinkerTypeMap&); // DO NOT IMPLEMENT
+public:
+  LinkerTypeMap() {}
+  ~LinkerTypeMap() {
     for (DenseMap<const Type*, PATypeHolder>::iterator I = TheMap.begin(),
          E = TheMap.end(); I != E; ++I)
       I->first->removeAbstractTypeUser(this);