mesa/main: Verify calloc return value in register_surface()

Signed-off-by: Juha-Pekka Heikkila <juhapekka.heikkila@gmail.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>

src/mesa/main/vdpau.c

@@ -132,6 +132,11 @@ register_surface(struct gl_context *ctx, GLboolean isOutput,
    }
 
    surf = CALLOC_STRUCT( vdp_surface );
+   if (surf == NULL) {
+      _mesa_error_no_memory("VDPAURegisterSurfaceNV");
+      return (GLintptr)NULL;
+   }
+
    surf->vdpSurface = vdpSurface;
    surf->target = target;
    surf->access = GL_READ_WRITE;