message: Fix GCC warning -Wmaybe-uninitialized
diff: @@ -1668,12 +1668,14 @@ void NURBSExtension::ConnectBoundaries()
  void NURBSExtension::ConnectBoundaries2D(int bnd0, int bnd1)
  {
  - int idx0, idx1;
  + int idx0 = -1, idx1 = -1;
  for (int b = 0; b < GetNBP(); b++)
  {
  if (bnd0 == patchTopo->GetBdrAttribute(b)) { idx0 = b; }
  if (bnd1 == patchTopo->GetBdrAttribute(b)) { idx1 = b; }
  }
  + MFEM_VERIFY(idx0 != -1,"Bdr 0 not found");
  + MFEM_VERIFY(idx1 != -1,"Bdr 1 not found");
  NURBSPatchMap p2g0(this);
  NURBSPatchMap p2g1(this);
  @@ -1742,12 +1744,14 @@ void NURBSExtension::ConnectBoundaries2D(int bnd0, int bnd1)
  void NURBSExtension::ConnectBoundaries3D(int bnd0, int bnd1)
  {
  - int idx0, idx1;
  + int idx0 = -1, idx1 = -1;
  for (int b = 0; b < GetNBP(); b++)
  {
  if (bnd0 == patchTopo->GetBdrAttribute(b)) { idx0 = b; }
  if (bnd1 == patchTopo->GetBdrAttribute(b)) { idx1 = b; }
  }
  + MFEM_VERIFY(idx0 != -1,"Bdr 0 not found");
  + MFEM_VERIFY(idx1 != -1,"Bdr 1 not found");
  NURBSPatchMap p2g0(this);
  NURBSPatchMap p2g1(this);
  