Fix typo in comparison in clang_CXCursorSet_contains().

Fixes PR 10124.

Patch by Jens Kilian.

Thanks to Nikola Smiljanic for following up.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@180177 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/libclang/CXCursor.cpp b/tools/libclang/CXCursor.cpp
index b568205..2cdb71b 100644
--- a/tools/libclang/CXCursor.cpp
+++ b/tools/libclang/CXCursor.cpp
@@ -1045,7 +1045,7 @@
   CXCursorSet_Impl *setImpl = unpackCXCursorSet(set);
   if (!setImpl)
     return 0;
-  return setImpl->find(cursor) == setImpl->end();
+  return setImpl->find(cursor) != setImpl->end();
 }
 
 unsigned clang_CXCursorSet_insert(CXCursorSet set, CXCursor cursor) {