patch 8.1.0754: preferred column is lost when setting 'cursorcolumn'

Problem:    Preferred column is lost when setting 'cursorcolumn'.
Solution:   Change option flag to P_RWINONLY. (Takayuki Kurosawa,
            closes #3806)
diff --git a/src/version.c b/src/version.c
index 708f96f..cf58605 100644
--- a/src/version.c
+++ b/src/version.c
@@ -796,6 +796,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    754,
+/**/
     753,
 /**/
     752,