patch 8.1.2163: cannot build with +spell but without +syntax

Problem:    Cannot build with +spell but without +syntax.
Solution:   Add #ifdef. (John Marriott)

Author: brammool

src/drawline.c

@@ -1421,7 +1421,9 @@ win_line(
 			syntax_attr = prev_syntax_attr;
 		    else
 		    {
+# ifdef FEAT_SPELL
 			can_spell = TRUE;
+# endif
 			syntax_attr = get_syntax_attr((colnr_T)v,
 # ifdef FEAT_SPELL
 						has_spell ? &can_spell :

src/version.c

@@ -753,6 +753,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2163,
 /**/
     2162,
 /**/