diff -r e8f2a53c3d6e indra/newview/lltoolpie.cpp
--- a/indra/newview/lltoolpie.cpp	Fri Jun 17 17:38:24 2011 -0400
+++ b/indra/newview/lltoolpie.cpp	Tue Jun 21 08:50:25 2011 -0700
@@ -639,6 +639,7 @@
 	if (click_action == CLICK_ACTION_NONE				// not doing 1-click action
 		&& gSavedSettings.getBOOL("ClickToWalk")		// click to walk enabled
 		&& !gAgent.getFlying()							// don't auto-navigate while flying until that works
+		&& gAgentAvatarp
 		&& !gAgentAvatarp->isSitting()
 		&& !mBlockClickToWalk							// another behavior hasn't cancelled click to walk
 		&& !mPick.mPosGlobal.isExactlyZero()			// valid coordinates for pick