patch 7.4.1236

Problem:    When "syntax manual" was used switching between buffers removes
            the highlighting.
Solution:   Set the syntax option without changing the value. (Anton
            Lindqvist)

src/version.c

@@ -742,6 +742,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1236,
 /**/
     1235,
 /**/