message: demo: Minor .obj loader cleanup
  Move fixupIndex calls to be able to just memcpy triangle index array to
  destination.
diff: @@ -242,25 +242,21 @@ void objParseLine(ObjFile& result, const char* line)
  if (vi == 0)
  break;
  - f[fv][0] = vi;
  - f[fv][1] = vti;
  - f[fv][2] = vni;
  + f[fv][0] = fixupIndex(vi, v);
  + f[fv][1] = fixupIndex(vti, vt);
  + f[fv][2] = fixupIndex(vni, vn);
  if (fv == 2)
  {
  if (result.f_size + 9 > result.f_cap)
  growArray(result.f, result.f_cap);
  - for (int k = 0; k < 3; ++k)
  - {
  - result.f[result.f_size++] = fixupIndex(f[k][0], v);
  - result.f[result.f_size++] = fixupIndex(f[k][1], vt);
  - result.f[result.f_size++] = fixupIndex(f[k][2], vn);
  - }
  + memcpy(&result.f[result.f_size], f, 9 * sizeof(int));
  + result.f_size += 9;
  - f[1][0] = vi;
  - f[1][1] = vti;
  - f[1][2] = vni;
  + f[1][0] = f[2][0];
  + f[1][1] = f[2][1];
  + f[1][2] = f[2][2];
  }
  else
  {
  