Ensuring that we don't start dragging while another drag is in progress.

Change-Id: If3c5a059407efc3ee9a0c9b1b3b7fb942d3a7664
diff --git a/src/com/android/launcher2/Launcher.java b/src/com/android/launcher2/Launcher.java
index 1ec326b..7faa520 100644
--- a/src/com/android/launcher2/Launcher.java
+++ b/src/com/android/launcher2/Launcher.java
@@ -2221,7 +2221,7 @@
 
         final View itemUnderLongClick = longClickCellInfo.cell;
 
-        if (mWorkspace.allowLongPress()) {
+        if (mWorkspace.allowLongPress() && !mDragController.isDragging()) {
             if (itemUnderLongClick == null) {
                 // User long pressed on empty space
                 mWorkspace.setAllowLongPress(false);