updated for version 7.4.592
Problem:    When doing ":e foobar" when already editing "foobar" and 'buftype'
            is "nofile" the buffer is cleared. (Xavier de Gaye)
Solution:   Do no clear the buffer.
diff --git a/src/version.c b/src/version.c
index 33f8a97..abf41a6 100644
--- a/src/version.c
+++ b/src/version.c
@@ -742,6 +742,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    592,
+/**/
     591,
 /**/
     590,