[Crawl-ref-discuss] Compile warning

[Eino K. <ein...@gm...>]

In excitement of the new Artificer class being added, I compiled the
latest revision on crawl.develz.org. I got this compile warning:

i586-mingw32msvc-g++ -Iutil -I.
-I/home/services/crawl/source/mingw32/include -Iutil/lua/src
-Iutil/sqlite -Iutil/pcre -Wwrite-strings  -fsigned-char
-fstrict-aliasing -pedantic -O2 -DWIN32CONSOLE
-DBUILD_REVISION=\"7781\" -DWINMM_PLAY_SOUNDS -DCLUA_BINDINGS -DWIZARD
-o build/religion.o -c religion.cc
religion.cc: In function `int _gold_to_donation(int)':
religion.cc:5978: warning: converting to `int' from `double'

--Eino