patch 8.0.0282: need to use CTRL-O twice when in Visual-Insert mode

Problem:    When doing a Visual selection and using "I" to go to insert mode,
            CTRL-O needs to be used twice to go to Normal mode. (Coacher)
Solution:   Check for the return value of edit(). (Christian Brabandt,
            closes #1290)

src/normal.c

@@ -2041,6 +2041,8 @@ do_pending_operator(cmdarg_T *cap, int old_col, int gui_yank)
 
 		if (restart_edit == 0)
 		    restart_edit = restart_edit_save;
+		else
+		    cap->retval |= CA_COMMAND_BUSY;
 	    }
 #else
 	    vim_beep(BO_OPER);

src/ops.c

@@ -2571,7 +2571,8 @@ op_insert(oparg_T *oap, long count1)
     }
 
     t1 = oap->start;
-    edit(NUL, FALSE, (linenr_T)count1);
+    if (edit(NUL, FALSE, (linenr_T)count1))
+	return;
 
     /* When a tab was inserted, and the characters in front of the tab
      * have been converted to a tab as well, the column of the cursor

src/version.c

@@ -764,6 +764,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    282,
 /**/
     281,
 /**/