Squelch some VC++ compiler warnings. Mark float literals with the "f"

Neil Conway <neilc@samurai.com>

Commit: 8ff2bccee31a7be12f653bc533b3e76c052534f8
Author: Neil Conway <neilc@samurai.com>
Date: 2007-01-26T17:45:42Z
Releases: 8.3.0
Squelch some VC++ compiler warnings. Mark float literals with the "f"
suffix, to distinguish them from doubles. Make some function declarations
and definitions use the "const" qualifier for arguments consistently.
Ignore warning 4102 ("unreferenced label"), because such warnings
are always emitted by bison-generated code. Patch from Magnus Hagander.

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