patch 8.0.0276: unnecessary #ifdefs

Problem:    Checking for FEAT_GUI_GNOME inside GTK 3 code is unnecessary.
Solution:   Remove the #ifdef. (Kazunobu Kuriyama)
diff --git a/src/gui_gtk_x11.c b/src/gui_gtk_x11.c
index 8781e2c..eef0bd4 100644
--- a/src/gui_gtk_x11.c
+++ b/src/gui_gtk_x11.c
@@ -3212,15 +3212,7 @@
 	GtkAllocation allocation;
 
 	gtk_widget_get_allocation(widget, &allocation);
-
-#  ifdef FEAT_GUI_GNOME
-	if (orientation == GTK_ORIENTATION_HORIZONTAL)
-	    return allocation.height;
-	else
-	    return allocation.width;
-#  else
 	return allocation.height;
-#endif
 # else
 #  ifdef FEAT_GUI_GNOME
 	if (orientation == GTK_ORIENTATION_HORIZONTAL)
diff --git a/src/version.c b/src/version.c
index d8b82a8..8aeb688 100644
--- a/src/version.c
+++ b/src/version.c
@@ -765,6 +765,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    276,
+/**/
     275,
 /**/
     274,