adjust for the new -Wvector-conversions option


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@69366 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Sema/vector-assign.c b/test/Sema/vector-assign.c
index 3c0cd90..5162e1a 100644
--- a/test/Sema/vector-assign.c
+++ b/test/Sema/vector-assign.c
@@ -1,4 +1,4 @@
-// RUN: clang-cc %s -verify -fsyntax-only
+// RUN: clang-cc %s -verify -fsyntax-only -Wvector-conversions
 typedef unsigned int v2u __attribute__ ((vector_size (8)));
 typedef signed int v2s __attribute__ ((vector_size (8)));
 typedef signed int v1s __attribute__ ((vector_size (4)));