vec: Silence clang warning

I noticed during compatibility testing that clang warns that this
operator won't be implicitly const in C++14 onwards.

gcc/
	* vec.h (vnull::operator vec<T, A, L>): Make const.

diff --git a/gcc/vec.h b/gcc/vec.h
index 09166f1bce6bb24891e845010a2cf1c4905f0ad8..31574b49c25c406b76b0f4d42f2569c0f6402f4a 100644 (file)
--- a/gcc/vec.h
+++ b/gcc/vec.h
@@ -550,7 +550,7 @@ vec_copy_construct (T *dst, const T *src, unsigned n)
 struct vnull
 {
   template <typename T, typename A, typename L>
-  CONSTEXPR operator vec<T, A, L> () { return vec<T, A, L>(); }
+  CONSTEXPR operator vec<T, A, L> () const { return vec<T, A, L>(); }
 };
 extern vnull vNULL;