GImpactCollisionShape : fix for #188, added a call to updateBound() in native jni binding, just after creating the shape, (native createShape() method)

jme3-bullet-native/src/native/cpp/com_jme3_bullet_collision_shapes_GImpactCollisionShape.cpp

@@ -51,6 +51,7 @@ extern "C" {
         jmeClasses::initJavaClasses(env);
         btTriangleIndexVertexArray* array = reinterpret_cast<btTriangleIndexVertexArray*>(meshId);
         btGImpactMeshShape* shape = new btGImpactMeshShape(array);
+        shape->updateBound();
         return reinterpret_cast<jlong>(shape);
     }