Switch all add_assoc_string_ex to add_assoc_string to avoid nul char management
Switch all add_assoc_string_ex to add_assoc_string to avoid nul char management

PHP 5 => #define add_assoc_string(__arg, __key, __str, __duplicate) add_assoc_string_ex(__arg, __key, strlen(__key)+1, __str, __duplicate)
PHP 7 => #define add_assoc_string(__arg, __key, __str)              add_assoc_string_ex(__arg, __key, strlen(__key),   __str)

Signed-off-by: Michal Privoznik <83d82aaba2eed257f4814b0c239c260c4caaadf0@redhat.com>

libvirt/libvirt-php,libvirt/libvirt-php,libvirt/libvirt-php,zippy2/libvirt-php,zippy2/libvirt-php,zippy2/libvirt-php