patch 8.0.1550: various small problems in source files

Problem:    Various small problems in source files.
Solution:   Fix the problems.
diff --git a/src/gui_gtk.c b/src/gui_gtk.c
index 7ae9cbf..ed539e3 100644
--- a/src/gui_gtk.c
+++ b/src/gui_gtk.c
@@ -1895,8 +1895,8 @@
 	trigger.window     = gtk_widget_get_window(gui.drawarea);
 	trigger.send_event = FALSE;
 	trigger.time       = gui.event_time;
-	trigger.x          = 0.0;
-	trigger.y          = 0.0;
+	trigger.x	   = 0.0;
+	trigger.y	   = 0.0;
 	trigger.axes       = NULL;
 	trigger.state      = 0;
 	trigger.button     = 3;
@@ -1983,8 +1983,8 @@
 	trigger.window     = win;
 	trigger.send_event = FALSE;
 	trigger.time       = GDK_CURRENT_TIME;
-	trigger.x          = 0.0;
-	trigger.y          = 0.0;
+	trigger.x	   = 0.0;
+	trigger.y	   = 0.0;
 	trigger.axes       = NULL;
 	trigger.state      = 0;
 	trigger.button     = 0;