patch 9.1.0151: ml_get_buf_len() does not consider text properties

Problem:  ml_get_buf_len() does not consider text properties
          (zeertzj)
Solution: Store text length excluding text properties length
          in addition in the memline

related #14123
closes: #14133

Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/version.c b/src/version.c
index 8c48034..ae5d17a 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    151,
+/**/
     150,
 /**/
     149,