libclang: make getCursorParentDecl() return 'const Decl *'


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@173584 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/libclang/CXCursor.cpp b/tools/libclang/CXCursor.cpp
index 9bef91d..1a6a371 100644
--- a/tools/libclang/CXCursor.cpp
+++ b/tools/libclang/CXCursor.cpp
@@ -798,8 +798,8 @@
   return static_cast<const Attr *>(Cursor.data[1]);
 }
 
-Decl *cxcursor::getCursorParentDecl(CXCursor Cursor) {
-  return static_cast<Decl*>(const_cast<void*>(Cursor.data[0]));
+const Decl *cxcursor::getCursorParentDecl(CXCursor Cursor) {
+  return static_cast<const Decl *>(Cursor.data[0]);
 }
 
 ASTContext &cxcursor::getCursorContext(CXCursor Cursor) {