Removing some redundant resource definitions

Change-Id: I68ae602116e6eb334dfce2a013fcc42068c464bf
diff --git a/src/com/android/launcher3/DropTargetBar.java b/src/com/android/launcher3/DropTargetBar.java
index d025a9b..0543e8d 100644
--- a/src/com/android/launcher3/DropTargetBar.java
+++ b/src/com/android/launcher3/DropTargetBar.java
@@ -104,7 +104,7 @@
                         / (2 * (grid.inv.numColumns + 1)))
                         + grid.edgeMarginPx;
             } else {
-                gap = grid.desiredWorkspaceLeftRightMarginPx - grid.defaultWidgetPadding.right;
+                gap = grid.desiredWorkspaceLeftRightMarginPx - grid.inv.defaultWidgetPadding.right;
             }
             lp.width = grid.availableWidthPx - 2 * gap;