updated for version 7.3.921
Problem:    Trying to create a fontset handle when 'guifontset' is not set.
Solution:   Add curly braces around the code block. (Max Kirillov)
diff --git a/src/syntax.c b/src/syntax.c
index 8e2930c..4c69769 100644
--- a/src/syntax.c
+++ b/src/syntax.c
@@ -8082,6 +8082,7 @@
 	|| do_tooltip
 #  endif
 	    )
+    {
 	if (free_font)
 	    gui_mch_free_fontset(HL_TABLE()[idx].sg_fontset);
 	HL_TABLE()[idx].sg_fontset = fontset_name2handle(arg, 0
@@ -8092,6 +8093,7 @@
 		|| do_tooltip
 #  endif
 		);
+    }
     if (HL_TABLE()[idx].sg_fontset != NOFONTSET)
     {
 	/* If it worked and it's the Normal group, use it as the normal