fix a number of const qualification bugs.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@49257 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/DeclObjC.cpp b/lib/AST/DeclObjC.cpp
index a01c304..5671dbe 100644
--- a/lib/AST/DeclObjC.cpp
+++ b/lib/AST/DeclObjC.cpp
@@ -418,7 +418,7 @@
   return length; 
 }
 
-ObjCInterfaceDecl *const ObjCMethodDecl::getClassInterface() const {
+const ObjCInterfaceDecl *ObjCMethodDecl::getClassInterface() const {
   if (ObjCInterfaceDecl *ID = dyn_cast<ObjCInterfaceDecl>(MethodContext))
     return ID;
   if (ObjCCategoryDecl *CD = dyn_cast<ObjCCategoryDecl>(MethodContext))