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r2049 | helixhorned | 2011-09-30 07:02:13 -0700 (Fri, 30 Sep 2011) | 1 line

fix for the fix
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r2048 | helixhorned | 2011-09-30 06:52:02 -0700 (Fri, 30 Sep 2011) | 3 lines

When X- or Y-flipping a selection of highlighted sectors, also handle setting
the nextwall pointers correctly;  Add some 'asksave=1' and 'make old-nextwalls
invalid'.
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