patch 7.4.970

Problem:    Rare crash in getvcol(). (Timo Mihaljov)
Solution:   Check for the buffer being NULL in init_preedit_start_col.
            (Hirohito Higashi, Christian Brabandt)

Author: brammool

src/mbyte.c

@@ -4541,7 +4541,7 @@ init_preedit_start_col(void)
 {
     if (State & CMDLINE)
 	preedit_start_col = cmdline_getvcol_cursor();
-    else if (curwin != NULL)
+    else if (curwin != NULL && curwin->w_buffer != NULL)
 	getvcol(curwin, &curwin->w_cursor, &preedit_start_col, NULL, NULL);
     /* Prevent that preediting marks the buffer as changed. */
     xim_changed_while_preediting = curbuf->b_changed;

src/version.c

@@ -741,6 +741,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    970,
 /**/
     969,
 /**/