determine if a level_id is (not) in BRANCH_FOO; takes care of comparing level_type to LEVEL_DUNGEON.
git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@6034 c06c8d41-db1a-0410-9941-cceddc491573
Q2AYZGR7UBWG4CKVR6PJQD3UHDEBMAFBQ5PZLHT64CTREG3JYFZAC
L57WEZMVIHTFRLWVIPWOIOWHCF2I53TVUVYJ2V6IZ64R56FVTZZAC
WFF3Q3ZULDIEINTFTWSOXITLLJ7ARLS2RHNST5UYF4WZ3YUUV2YQC
5ASC3STDYCNLZFEBN6UTMUCGDETHBR2OCBZCF5VIAZ5RRWLOTDYQC
SDLKLUNFGVKDS55DDJZCBAVIB7NL3RRYPTACAY65SCUQKV6APFSAC
T6TL6NTIOBYNUIONGK3JFZJ5ONWV6S4CTIRDC5JMKMCBGG5IY3EAC
S2LIBA2CLTZ6ZU66AUZ2CCNLCDOBSGWQGTZ6HFAFP2XSWAALGLSQC
SVY2PTCLXR3KNPQAWXVXTTGCC5DR334HOAKHYO3VDDRWM2BWMALAC
TFZ4TER7O2Z4FOGF2RCPEPYIHBTUA4LG3ECXLR7XGLCC6GO6OOTAC
GACH6PWPGGUBEE7PFEPQMOZKSR7HTQGL2WLGF2AQPJD3FCCSKZNQC
K2CS6TCX2NDVL2ASEHGP4J4K4IJ6FP3ANNKTSIWVG43HPYSBX6ZQC
UZ6N6HOUPGVSPC5NQROEEDWMEGJA5XUWUY2AKH5QG65AZ25PVXDAC
WDEFQ6YABDQIGJXW5KT3OGR3EO6FZHXZELIRVIXQ4XDYTVOV5V6AC
OYYZVCE3QHBVJM6IEKK5HTJRG5YOVQNCBRMSJENTHOI2WPJLNCFAC