Merge branch 'ios_1.2.2'

flutter/lib/models/model.dart

@@ -1815,7 +1815,7 @@ class FFI {
           } else {
             // Fetch the image buffer from rust codes.
             final sz = platformFFI.getRgbaSize(sessionId);
-            if (sz == null || sz == 0) {
+            if (sz == 0) {
               return;
             }
             final rgba = platformFFI.getRgba(sessionId, sz);