Reduced monster spawn ramp-up in Vestibule.
git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@2217 c06c8d41-db1a-0410-9941-cceddc491573
6TGMILC5XI6LSK23OFFZWUSA4CXIFQ5O7GELZDIDZJCVX4OVJYZAC
ID373JATLMWAY526Q6Q5FXHRNFWMEOFXPHGPAUUY5OAMPFDN5SJAC
BFZZ7DFLZM4WNHQOKWDJENZOLMXH3UPHZ437BMISYJ3VSO2Y57WQC
K2CS6TCX2NDVL2ASEHGP4J4K4IJ6FP3ANNKTSIWVG43HPYSBX6ZQC
6HQB2N6N75R2RGKJFWRUN7WAC2PNGWQFXTII5DTRLTHZ2BOTMTVAC
LXLUKS5CKXBUSVV3QTZ4SM7NWSY6JFQEBHUBQW2VUEU5DOL3RRLAC
CQ24AVAI6SW3AHTIDMLPSTRRBEU6FHRF5I5FD6G5QIYE6PO4BQMQC
L5CVPV5IUBSO4EE3WK4O6SQGIMIEPSMQONFBWEVGJBR2HATLPZIAC
LL4FGIKVSJDKSCBNGS4ANIJGVTR6Q3LZPAJWGX3MY6V42P3BMZ6QC