Fix segfaults when using meshes in Cocos2d-x 3.13
Fix segfaults when using meshes in Cocos2d-x 3.13

meshDisplay->setContentSize() was clearing out the vertices for
the mesh. This was causing parts of the code to overwrite data in
the AutoreleasePool and getting a segfault.

Moving setContentSize() to before the setPolygonInfo() call appears
to resolve the issue.

brbranch/DragonBonesCPP,brbranch/DragonBonesCPP,DragonBones/DragonBonesCPP,DragonBones/DragonBonesCPP