patch 8.2.5080: when indenting gets out of hand it is hard to stop

Problem:    When indenting gets out of hand it is hard to stop.
Solution:   When line gets too long set got_int.
diff --git a/src/indent.c b/src/indent.c
index 7598c1c..f197027 100644
--- a/src/indent.c
+++ b/src/indent.c
@@ -1781,6 +1781,8 @@
 	    if (vcol >= MAXCOL)
 	    {
 		emsg(_(e_resulting_text_too_long));
+		// set got_int to break out of any loop
+		got_int = TRUE;
 		break;
 	    }
 	    if (has_mbyte)