patch 7.4.2357

Problem:    Attempt to read history entry while not initialized.
Solution:   Skip when the index is negative.

src/ex_getln.c

@@ -5762,7 +5762,7 @@ add_to_history(
      */
     if (histype == HIST_SEARCH && in_map)
     {
-	if (maptick == last_maptick)
+	if (maptick == last_maptick && hisidx[HIST_SEARCH] >= 0)
 	{
 	    /* Current line is from the same mapping, remove it */
 	    hisptr = &history[HIST_SEARCH][hisidx[HIST_SEARCH]];

src/version.c

@@ -763,6 +763,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2357,
 /**/
     2356,
 /**/