vkd3d-shader: Add a compiler message for invalid DXBC magic.

Signed-off-by: Henri Verbeet <hverbeet@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>

libs/vkd3d-shader/dxbc.c

@@ -1966,6 +1966,7 @@ static int parse_dxbc(const char *data, size_t data_size, struct vkd3d_shader_me
     if (tag != TAG_DXBC)
     {
         WARN("Wrong tag.\n");
+        vkd3d_shader_error(message_context, VKD3D_SHADER_ERROR_DXBC_INVALID_MAGIC, "Invalid DXBC magic.");
         return VKD3D_ERROR_INVALID_ARGUMENT;
     }
 

libs/vkd3d-shader/vkd3d_shader_private.h

@@ -62,6 +62,7 @@
 enum vkd3d_shader_error
 {
     VKD3D_SHADER_ERROR_DXBC_INVALID_SIZE         = 1,
+    VKD3D_SHADER_ERROR_DXBC_INVALID_MAGIC        = 2,
 };
 
 enum VKD3D_SHADER_INSTRUCTION_HANDLER