patch 8.2.0320: no Haiku support

Problem:    No Haiku support.
Solution:   Add support for Haiku. (Emir Sari, closes #5605)
diff --git a/src/globals.h b/src/globals.h
index 6f25748..6d3fa16 100644
--- a/src/globals.h
+++ b/src/globals.h
@@ -1524,7 +1524,7 @@
 EXTERN char e_fontset[]	INIT(= N_("E234: Unknown fontset: %s"));
 #endif
 #if defined(FEAT_GUI_X11) || defined(FEAT_GUI_GTK) || defined(FEAT_GUI_MAC) \
-	|| defined(FEAT_GUI_PHOTON) || defined(FEAT_GUI_MSWIN)
+	|| defined(FEAT_GUI_PHOTON) || defined(FEAT_GUI_MSWIN) || defined(FEAT_GUI_HAIKU)
 EXTERN char e_font[]		INIT(= N_("E235: Unknown font: %s"));
 #endif
 #if defined(FEAT_GUI_X11) && !defined(FEAT_GUI_GTK)