Bugfix #20605: Shape key values not keyable from mesh data panel. Keyable from Datablock browser.

See the bugreport comments for full breakdown of the fix. 


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The change in brush.c is to get blender compiling again, after my previous commit which tried to fix a compiler warning related to this (but in the header file instead).

release/scripts/ui/properties_data_mesh.py

@@ -150,7 +150,12 @@ class DATA_PT_shape_keys(DataButtonsPanel):
 
         ob = context.object
         key = ob.data.shape_keys
-        kb = ob.active_shape_key
+        if key and len(key.keys):
+            # this is so that we get the active shapekey from the 
+            # shapekeys block, not from object data
+            kb = key.keys[ob.active_shape_key.name]
+        else:
+            kb = None
         wide_ui = context.region.width > narrowui
 
         enable_edit = ob.mode != 'EDIT'