SL-14107 fixed crash due to missing animation when avatar hits the ground after falling down

indra/llcharacter/llkeyframefallmotion.cpp

@@ -70,6 +70,11 @@ LLMotion::LLMotionInitStatus LLKeyframeFallMotion::onInitialize(LLCharacter *cha
 	// load keyframe data, setup pose and joint states
 	LLMotion::LLMotionInitStatus result = LLKeyframeMotion::onInitialize(character);
 
+	if (result != LLMotion::STATUS_SUCCESS)
+	{
+		return result;
+	}
+
 	for (U32 jm=0; jm<mJointMotionList->getNumJointMotions(); jm++)
 	{
 		if (!mJointStates[jm]->getJoint())