patch 7.4.2222

Problem:    Sourcing a script where a character has 0x80 as a second byte does
            not work. (Filipe L B Correia)
Solution:   Turn 0x80 into K_SPECIAL KS_SPECIAL KE_FILLER. (Christian
            Brabandt, closes #728)  Add a test case.

src/version.c

@@ -763,6 +763,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2222,
 /**/
     2221,
 /**/