lightdm-gtk-greeter: fix build with lightdm >= 1.19.3

resolves void-linux/void-packagaes#3014

srcpkgs/lightdm-gtk-greeter/patches/fix-lightdm=1.19.3-compilation.patch

@@ -0,0 +1,75 @@
+Source: Gentoo (Adapted)
+Upstream: No
+Reason: Fixes compilation with lightdm newer than 1.19.3
+
+diff --git a/src/lightdm-gtk-greeter.c b/src/lightdm-gtk-greeter.c
+index 4204d14..80c2a2f 100644
+--- a/src/lightdm-gtk-greeter.c
++++ b/src/lightdm-gtk-greeter.c
+@@ -948,11 +948,11 @@ start_authentication (const gchar *username)
+     {
+         gtk_widget_show (GTK_WIDGET (username_entry));
+         gtk_widget_show (GTK_WIDGET (cancel_button));
+-        lightdm_greeter_authenticate (greeter, NULL);
++        lightdm_greeter_authenticate (greeter, NULL, &error);
+     }
+     else if (g_strcmp0 (username, "*guest") == 0)
+     {
+-        lightdm_greeter_authenticate_as_guest (greeter);
++        lightdm_greeter_authenticate_as_guest (greeter, &error);
+     }
+     else
+     {
+@@ -972,7 +972,7 @@ start_authentication (const gchar *username)
+             set_language (NULL);
+         }
+ 
+-        lightdm_greeter_authenticate (greeter, username);
++        lightdm_greeter_authenticate (greeter, username, &error);
+     }
+ }
+ 
+@@ -982,6 +982,7 @@ cancel_authentication (void)
+     GtkTreeModel *model;
+     GtkTreeIter iter;
+     gboolean other = FALSE;
++    GError *error = NULL;
+ 
+     if (pending_questions)
+     {
+@@ -994,7 +995,7 @@ cancel_authentication (void)
+     if (lightdm_greeter_get_in_authentication (greeter))
+     {
+         cancelling = TRUE;
+-        lightdm_greeter_cancel_authentication (greeter);
++        lightdm_greeter_cancel_authentication (greeter, &error);
+         set_message_label ("");
+     }
+ 
+@@ -1031,7 +1032,7 @@ start_session (void)
+ 
+     language = get_language ();
+     if (language)
+-        lightdm_greeter_set_language (greeter, language);
++        lightdm_greeter_set_language (greeter, language, &error);
+     g_free (language);
+ 
+     session = get_session ();
+@@ -1362,6 +1363,8 @@ G_MODULE_EXPORT
+ void
+ login_cb (GtkWidget *widget)
+ {
++    GError *error = NULL;
++
+     /* Reset to default screensaver values */
+     if (lightdm_greeter_get_lock_hint (greeter))
+         XSetScreenSaver(gdk_x11_display_get_xdisplay(gdk_display_get_default ()), timeout, interval, prefer_blanking, allow_exposures);        
+@@ -1375,7 +1378,7 @@ login_cb (GtkWidget *widget)
+         start_session ();
+     else if (lightdm_greeter_get_in_authentication (greeter))
+     {
+-        lightdm_greeter_respond (greeter, gtk_entry_get_text (password_entry));
++        lightdm_greeter_respond (greeter, gtk_entry_get_text (password_entry), &error);
+         /* If we have questions pending, then we continue processing
+          * those, until we are done. (Otherwise, authentication will
+          * not complete.) */

srcpkgs/lightdm-gtk-greeter/template

@@ -2,6 +2,7 @@
 pkgname=lightdm-gtk-greeter
 version=1.8.5
 revision=3
+patch_args="-Np1"
 build_style=gnu-configure
 configure_args="--disable-static --with-gtk2
  --enable-compile-warnings=no"
@@ -16,4 +17,3 @@ license="GPL-3, LGPL-3"
 homepage="https://launchpad.net/lightdm-gtk-greeter"
 distfiles="${homepage}/${version%.*}/${version}/+download/${pkgname}-${version}.tar.gz"
 checksum=22386e787dc64ac372c63cf2cdce47bfa1c791d1cf8b5d3df68df24ecfbf7d68
-broken="lightdm-gtk-greeter.c:1378:9: error: too few arguments to function lightdm_greeter_respond"