PangoLanguage: Fix clang -Wcast-align warnings
Warnings:
../pango/pango-language.c:69:10: warning: cast from 'char *' to 'PangoLanguagePrivate *' increases required alignment from 1 to 8 [-Wcast-align]
priv = (PangoLanguagePrivate *) ((char *)language - sizeof (PangoLanguagePrivate));
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../pango/pango-language.c:356:10: warning: cast from 'char *' to 'PangoLanguagePrivate *' increases required alignment from 1 to 8 [-Wcast-align]
priv = (PangoLanguagePrivate *) result;
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../pango/pango-language.c:791:10: warning: cast from 'gchar *' (aka 'char *') to 'PangoLanguage **' (aka 'struct _PangoLanguage **') increases required alignment from 1 to 8 [-Wcast-align]
return (PangoLanguage **) g_array_free (langs, FALSE);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~