patch 8.1.0683: spell highlighting does not always end

Problem:    Spell highlighting does not always end. (Gary Johnson)
Solution:   Also reset char_attr when spell errors are highlighted.
diff --git a/src/screen.c b/src/screen.c
index e0e9d3b..adc62e1 100644
--- a/src/screen.c
+++ b/src/screen.c
@@ -4161,7 +4161,11 @@
 	    break;
 	}
 
-	if (draw_state == WL_LINE && area_highlighting)
+	if (draw_state == WL_LINE && (area_highlighting
+#ifdef FEAT_SPELL
+		|| has_spell
+#endif
+	   ))
 	{
 	    /* handle Visual or match highlighting in this line */
 	    if (vcol == fromcol
diff --git a/src/version.c b/src/version.c
index a7bee90..c337967 100644
--- a/src/version.c
+++ b/src/version.c
@@ -800,6 +800,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    683,
+/**/
     682,
 /**/
     681,