Fix secondary entrances data extraction

[marian-m12l]

Description

This PR fixes extraction of the "secondary entrances" data in the python script. Since the support of LM was added, secondary entrances data in range 0x5f800-0x5ffff are ignored, which results in transitioning to a broken "bonus level" whenever mario enters a pipe that should bring him back to the main level.

Will this Pull Request break anything?

No.

Suggested Testing Steps

• Run game with g_runmode = RM_MINE
• Enter level Yoshi's Island 1
• Enter the 2nd blue pipe (under two yellow blocks)
• Enter the pipe to go back to the main part of the level
• Before fix: you get directed to a broken bonus level
• After fix: you get back to the correct position, being shot out of a pipe in the main part of the level