Fixed error in dict_add_fast

kernel/modelverse_kernel/primitives.py

@@ -286,7 +286,7 @@ def dict_add(a, b, c, **remainder):
 
 def dict_add_fast(a, b, c, **remainder):
     v, = yield [("RV", [b])]
-    yield [("CD", [a, b, c])]
+    yield [("CD", [a, v, c])]
     raise PrimitiveFinished(a)
 
 def dict_delete(a, b, **remainder):