Pica: Add the vertex_offset register to the Pica registers map.

src/video_core/pica.cpp

@@ -49,6 +49,7 @@ std::string Regs::GetCommandName(int index) {
         ADD_FIELD(vertex_attributes);
         ADD_FIELD(index_array);
         ADD_FIELD(num_vertices);
+        ADD_FIELD(vertex_offset);
         ADD_FIELD(trigger_draw);
         ADD_FIELD(trigger_draw_indexed);
         ADD_FIELD(vs_default_attributes_setup);