[cpp] Fix to stretchy IK.

spine-cpp/spine-cpp/src/spine/IkConstraint.cpp

@@ -194,7 +194,7 @@ void IkConstraint::apply(Bone &parent, Bone &child, float targetX, float targetY
 		a1 = (a1 - os) * MathUtil::Rad_Deg + o1 - parent._arotation;
 		if (a1 > 180) a1 -= 360;
 		else if (a1 < -180) a1 += 360;
-		parent.updateWorldTransform(px, py, parent._rotation + a1 * alpha, parent._ascaleX, parent._ascaleY, 0, 0);
+		parent.updateWorldTransform(px, py, parent._rotation + a1 * alpha, sx, parent._ascaleY, 0, 0);
 		a2 = ((a2 + os) * MathUtil::Rad_Deg - child._ashearX) * s2 + o2 - child._arotation;
 		if (a2 > 180) a2 -= 360;
 		else if (a2 < -180) a2 += 360;

spine-sfml/cpp/example/main.cpp

@@ -459,8 +459,8 @@ int main () {
 	DebugExtension dbgExtension(SpineExtension::getInstance());
 	SpineExtension::setInstance(&dbgExtension);
 
-	testcase(spineboy, "data/spineboy-ess.json", "data/spineboy-ess.skel", "data/spineboy.atlas", 0.6f);
 	testcase(stretchymanStrechyIk, "data/stretchyman-stretchy-ik.json", "data/stretchyman-stretchy-ik.skel", "data/stretchyman.atlas", 0.6f);
+	testcase(spineboy, "data/spineboy-ess.json", "data/spineboy-ess.skel", "data/spineboy.atlas", 0.6f);
 	testcase(raptor, "data/raptor-pro.json", "data/raptor-pro.skel", "data/raptor.atlas", 0.5f);
 	testcase(coin, "data/coin-pro.json", "data/coin-pro.skel", "data/coin.atlas", 0.5f);
 	testcase(test, "data/tank-pro.json", "data/tank-pro.skel", "data/tank.atlas", 1.0f);