patch 8.1.2160: cannot build with +syntax but without +terminal

Problem:    Cannot build with +syntax but without +terminal.
Solution:   Add #ifdef.

src/drawline.c

@@ -1517,7 +1517,11 @@ win_line(
 		else
 #endif
 #ifdef FEAT_SYN_HL
-		if (has_syntax || get_term_attr)
+		    if (has_syntax
+# ifdef FEAT_TERMINAL
+			    || get_term_attr
+# endif
+		       )
 			char_attr = syntax_attr;
 		else
 #endif

src/version.c

@@ -753,6 +753,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2160,
 /**/
     2159,
 /**/