Patch for warnings and perhaps a bug

[proj4-bot]

Reported by dcthomp on 3 Jun 2008 15:19 UTC
I've made some changes to PROJ.4 to get it compiling without
any warnings even setting CFLAGS="-W -Wall". I've attached a
patch.

Most of the changes are straightforward, a few are tedious, and
one of the warnings appears to actually point to a bug. Specifically,
in src/PJ_imw_p.c it looks like the argument "double* yc" is
shadowed by a local variable below and thus never used. The patch
includes what I believe to be a fix, but it would be nice if someone
reviewed it.

The only other real problem I had was with the declaration and
initialization of "static char EMESS_H_ID[]" inside src/emess.h.
Since this header file is included multiple times it results in
EMESS_H_ID being instantiated in multiple object files. I removed
the variable since it doesn't appear to be used.

Migrated-From: https://trac.osgeo.org/proj/ticket/4

[proj4-bot]

Attachment added by dcthomp on 3 Jun 2008 15:21 UTC
https://trac.osgeo.org/proj/attachment/ticket/4/proj4-warnings.patch