Don't pass along unused btStackAlloc everywhere. The API change might user code (derived classes with the old virtual method are not called anymore)

src/BulletCollision/NarrowPhaseCollision/btGjkPairDetector.cpp

@@ -355,7 +355,7 @@ void btGjkPairDetector::getClosestPointsNonVirtual(const ClosestPointInput& inpu
 					m_minkowskiA,m_minkowskiB,
 					localTransA,localTransB,
 					m_cachedSeparatingAxis, tmpPointOnA, tmpPointOnB,
-					debugDraw,input.m_stackAlloc
+					debugDraw
 					);