kc3-lang/SDL

diff --git a/src/render/metal/SDL_render_metal.m b/src/render/metal/SDL_render_metal.m
index e4dd590..00e5de9 100644
--- a/src/render/metal/SDL_render_metal.m
+++ b/src/render/metal/SDL_render_metal.m
@@ -1084,7 +1084,7 @@ METAL_QueueSetDrawColor(SDL_Renderer *renderer, SDL_RenderCommand *cmd)
 static int
 METAL_QueueDrawPoints(SDL_Renderer * renderer, SDL_RenderCommand *cmd, const SDL_FPoint * points, int count)
 {
-    const int color = (cmd->data.draw.r << 0) | (cmd->data.draw.g << 8) | (cmd->data.draw.b << 16) | (cmd->data.draw.a << 24);
+    const int color = (cmd->data.draw.r << 0) | (cmd->data.draw.g << 8) | (cmd->data.draw.b << 16) | ((Uint32)cmd->data.draw.a << 24);
     const size_t vertlen = (2 * sizeof (float) + sizeof (int)) * count;
     float *verts = (float *) SDL_AllocateRenderVertices(renderer, vertlen, DEVICE_ALIGN(8), &cmd->data.draw.first);
     if (!verts) {
@@ -1104,7 +1104,7 @@ static int
 METAL_QueueDrawLines(SDL_Renderer * renderer, SDL_RenderCommand *cmd, const SDL_FPoint * points, int count)
 {
 
-    const int color = (cmd->data.draw.r << 0) | (cmd->data.draw.g << 8) | (cmd->data.draw.b << 16) | (cmd->data.draw.a << 24);
+    const int color = (cmd->data.draw.r << 0) | (cmd->data.draw.g << 8) | (cmd->data.draw.b << 16) | ((Uint32)cmd->data.draw.a << 24);
 
     SDL_assert(count >= 2);  /* should have been checked at the higher level. */