BLIT_P gives different results (Calc vs. Emu.)

[komame]

Just add this line before RECT_P(G1)

Code:

DIMGROB_P(G1,20,20);

By default the GROB G1 may be not defined and you should always set the dimensions.
It is unnecessary for G0 but for G1-G9 it shold be defined before first use.