updated for version 7.4.526

Problem:    matchstr() fails on long text. Daniel Hahler)
Solution:   Return NFA_TOO_EXPENSIVE from regexec_nl(). (Christian Brabandt)

src/version.c

@@ -741,6 +741,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    526,
 /**/
     525,
 /**/