Aborting reset_multis() when there are zero multiline regexes.

git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@5525 35c25a1d-7b9e-4130-9fde-d3aeb78583b8

ChangeLog

@@ -5,6 +5,7 @@
 	* src/nano.c (do_output): Let reset_multis() figure out whether after
 	an addition a full refresh is needed (for multiline-regexes' sake),
 	instead of doing it always.
+	* src/color.c (reset_multis): Abort when having no multiline regexes.
 
 2016-01-02  Benno Schulenberg  <bensberg@justemail.net>
 	* src/text.c (do_spell, do_formatter): Plug three tiny memory leaks.

src/color.c

@@ -417,7 +417,8 @@ void reset_multis(filestruct *fileptr, bool force)
     regmatch_t startmatch, endmatch;
     const colortype *tmpcolor = openfile->colorstrings;
 
-    if (!openfile->syntax)
+    /* If there is no syntax or no multiline regex, there is nothing to do. */
+    if (openfile->syntax == NULL || openfile->syntax->nmultis == 0)
 	return;
 
     for (; tmpcolor != NULL; tmpcolor = tmpcolor->next) {

src/nano.c

@@ -1728,8 +1728,7 @@ int do_input(bool allow_funcs)
 			/* Execute the function of the shortcut. */
 			s->scfunc();
 #ifndef DISABLE_COLOR
-			if (f && !f->viewok && openfile->syntax != NULL
+			if (f && !f->viewok)
-				&& openfile->syntax->nmultis > 0)
 			    reset_multis(openfile->current, FALSE);
 #endif
 			if (edit_refresh_needed) {