Compiler warnings in lwgeom_topo.c

[dbaston]

I'm haven't worked w/this functionality, so these may be irrelevant, but it seemed that No. 1 and 2 were not.

line 1382: parameter "ref" is never used

lines 3504 and 3516: if conditions check if variable does not equal itself (span_pre.nextCCW != span_pre.nextCCW)

line 4975: variable mindist is used but never initialized (I realize current usage is safe)

[strk]

I'm not seeing those warnings with -Wall, what are you using ? See also #3037.

[robe]

For the record, I don't see those warnings on either of the bots (windows or debian)

[strk]

All warnings should be fixed with r14205