message: ImDrawList::PrimReserve() minor renaming of locals to make things clearer
diff: @@ -360,13 +360,13 @@ void ImDrawList::PrimReserve(int idx_count, int vtx_count)
  ImDrawCmd& draw_cmd = CmdBuffer.Data[CmdBuffer.Size-1];
  draw_cmd.ElemCount += idx_count;
  - int vtx_buffer_size = VtxBuffer.Size;
  - VtxBuffer.resize(vtx_buffer_size + vtx_count);
  - _VtxWritePtr = VtxBuffer.Data + vtx_buffer_size;
  + int vtx_buffer_old_size = VtxBuffer.Size;
  + VtxBuffer.resize(vtx_buffer_old_size + vtx_count);
  + _VtxWritePtr = VtxBuffer.Data + vtx_buffer_old_size;
  - int idx_buffer_size = IdxBuffer.Size;
  - IdxBuffer.resize(idx_buffer_size + idx_count);
  - _IdxWritePtr = IdxBuffer.Data + idx_buffer_size;
  + int idx_buffer_old_size = IdxBuffer.Size;
  + IdxBuffer.resize(idx_buffer_old_size + idx_count);
  + _IdxWritePtr = IdxBuffer.Data + idx_buffer_old_size;
  }
  // Fully unrolled with inline call to keep our debug builds decently fast.
  