[Bf-blender-cvs] [0a3e36df55c] greasepencil-object: Fix UI warning

[Antonio Vazquez]

Commit: 0a3e36df55c91a93a70cc9a132b2a571cae30adc
Author: Antonio Vazquez
Date:   Mon Dec 18 17:43:52 2017 +0100
Branches: greasepencil-object
https://developer.blender.org/rB0a3e36df55c91a93a70cc9a132b2a571cae30adc

Fix UI warning

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M	release/scripts/startup/bl_ui/properties_grease_pencil_common.py

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diff --git a/release/scripts/startup/bl_ui/properties_grease_pencil_common.py b/release/scripts/startup/bl_ui/properties_grease_pencil_common.py
index c6354e3b523..d340a91e0ec 100644
--- a/release/scripts/startup/bl_ui/properties_grease_pencil_common.py
+++ b/release/scripts/startup/bl_ui/properties_grease_pencil_common.py
@@ -1221,7 +1221,8 @@ class GreasePencilDataPanel:
                 sub.operator("gpencil.layer_isolate", icon='RESTRICT_VIEW_OFF', text="").affect_visibility = True
 
         row = layout.row(align=True)
-        row.prop(gpl, "opacity", text="Opacity", slider=True)
+        if gpl:
+            row.prop(gpl, "opacity", text="Opacity", slider=True)
 
         layout.separator()