MSVC compiler warnings

[bluetech]

These are warnings the Windows CI displays. Some of these should be looked into. Mostly overflow and truncation potential due to casts. The enum casts can possibly lead to unaligned access.

../src/xkbcomp/parser.y(484): warning C4244: 'function': conversion from 'int64_t' to 'unsigned int', possible loss of data
../src/xkbcomp/parser.y(496): warning C4244: 'function': conversion from 'int64_t' to 'unsigned int', possible loss of data
../src/xkbcomp/parser.y(498): warning C4244: 'function': conversion from 'int64_t' to 'unsigned int', possible loss of data
../src/xkbcomp/parser.y(702): warning C4244: 'function': conversion from 'int64_t' to 'int', possible loss of data
d:\a\1\s\src\compose\parser.c(428): warning C4267: 'initializing': conversion from 'size_t' to 'unsigned int', possible loss of data
d:\a\1\s\src\xkbcomp\action.c(175): warning C4133: 'function': incompatible types - from 'xkb_action_type *' to 'unsigned int *'
d:\a\1\s\src\xkbcomp\action.c(181): warning C4133: 'function': incompatible types - from 'action_field *' to 'unsigned int *'
d:\a\1\s\src\xkbcomp\action.c(302): warning C4133: 'function': incompatible types - from 'xkb_action_flags *' to 'unsigned int *'
d:\a\1\s\src\xkbcomp\action.c(632): warning C4133: 'function': incompatible types - from 'xkb_action_controls *' to 'unsigned int *'
d:\a\1\s\src\xkbcomp\compat.c(269): warning C4133: 'function': incompatible types - from 'xkb_match_operation *' to 'unsigned int *'
d:\a\1\s\src\xkbcomp\rules.c(312): warning C4267: '=': conversion from 'size_t' to 'unsigned int', possible loss of data
d:\a\1\s\src\xkbcomp\scanner.c(55): warning C4244: '=': conversion from 'double' to 'int64_t', possible loss of data
d:\a\1\s\test\log.c(64): warning C4267: 'initializing': conversion from 'size_t' to 'unsigned int', possible loss of data
d:\a\1\s\test\log.c(66): warning C4267: 'initializing': conversion from 'size_t' to 'unsigned int', possible loss of data
src/xkbcomp/keywords.gperf(95): warning C4267: 'initializing': conversion from 'size_t' to 'unsigned int', possible loss of data