Tweak default ID types processing order, step 03: Mask.

Move it with the rest of the image/shading related types.

source/blender/makesdna/DNA_ID.h

@@ -770,6 +770,7 @@ enum {
   INDEX_ID_PAL,
   INDEX_ID_GD,
   INDEX_ID_NT,
+  INDEX_ID_MSK,
   INDEX_ID_IM,
   INDEX_ID_TE,
   INDEX_ID_MA,
@@ -802,7 +803,6 @@ enum {
   INDEX_ID_SCE,
   INDEX_ID_WS,
   INDEX_ID_WM,
-  INDEX_ID_MSK,
   INDEX_ID_NULL,
   INDEX_ID_MAX,
 };