patch 8.2.5029: "textlock" is always zero

Problem:    "textlock" is always zero.
Solution:   Remove "textlock" and rename "textwinlock" to "textlock".
            (closes #10489)
diff --git a/src/window.c b/src/window.c
index 984fb46..fa59ade 100644
--- a/src/window.c
+++ b/src/window.c
@@ -4584,7 +4584,7 @@
 	return;
     }
 #endif
-    if (text_and_win_locked())
+    if (text_locked())
     {
 	beep_flush();
 	text_locked_msg();