alpm.c: remove warnings from libalpm and php updates
alpm.c: remove warnings from libalpm and php updates

php changed the standard object handlers to have a const qualifier.

libalpm changed the usage getters and setters to use an integer pointer
instead of one of libalpm's enumerations.

markzz/php-alpm,markzz/php-alpm,markzz/php-alpm