Pass the profile object instead of the profile name to pa_card_set_profile()

When setting attribute foo, or in this case the card profile, in my
opinion the thing passed to the set_foo() function should be of the
type of foo, not a string identifier that can be used to search for
the actual foo in set_foo().

This is mostly a question of taste, but there's at least some small
benefit from passing the actual object: often the profile object is
already available when calling pa_card_set_profile(), so passing the
card name would cause unnecessary searching when pa_card_set_profile()
needs to look up the profile from the hashmap.

src/modules/dbus/iface-card-profile.c

@@ -226,3 +226,9 @@ const char *pa_dbusiface_card_profile_get_name(pa_dbusiface_card_profile *p) {
 
     return p->profile->name;
 }
+
+pa_card_profile *pa_dbusiface_card_profile_get_profile(pa_dbusiface_card_profile *p) {
+    pa_assert(p);
+
+    return p->profile;
+}

src/modules/dbus/iface-card-profile.h

@@ -45,5 +45,6 @@ void pa_dbusiface_card_profile_free(pa_dbusiface_card_profile *p);
 
 const char *pa_dbusiface_card_profile_get_path(pa_dbusiface_card_profile *p);
 const char *pa_dbusiface_card_profile_get_name(pa_dbusiface_card_profile *p);
+pa_card_profile *pa_dbusiface_card_profile_get_profile(pa_dbusiface_card_profile *p);
 
 #endif

src/modules/dbus/iface-card.c

@@ -336,7 +336,7 @@ static void handle_set_active_profile(DBusConnection *conn, DBusMessage *msg, DB
         return;
     }
 
-    if ((r = pa_card_set_profile(c->card, pa_dbusiface_card_profile_get_name(new_active), true)) < 0) {
+    if ((r = pa_card_set_profile(c->card, pa_dbusiface_card_profile_get_profile(new_active), true)) < 0) {
         pa_dbus_send_error(conn, msg, DBUS_ERROR_FAILED,
                            "Internal error in PulseAudio: pa_card_set_profile() failed with error code %i.", r);
         return;