COMP: Value-initialize points in SubdivisionQuadEdgeMesh regression test

GCC -Wmaybe-uninitialized reports the FixedArray storage of the ipt/opt
points as possibly used uninitialized: they are filled by GetPoint()
through a pointer the optimizer cannot prove writes every element.
Value-initialize the points at declaration so their storage is defined
before GetPoint() overwrites it.

Author: hjmjohnson

Modules/Filtering/SubdivisionQuadEdgeMeshFilter/test/itkSubdivisionQuadEdgeMeshFilterRegressionTest.cxx

@@ -166,8 +166,8 @@ itkSubdivisionQuadEdgeMeshFilterRegressionTest(int, char *[])
     unsigned int nMoved = 0;
     for (MeshType::PointIdentifier pid = 0; pid < 4; ++pid)
     {
-      MeshType::PointType ipt;
-      MeshType::PointType opt;
+      MeshType::PointType ipt{};
+      MeshType::PointType opt{};
       mesh->GetPoint(pid, &ipt);
       out->GetPoint(pid, &opt);
       if (PointMoved(ipt, opt))