patch 7.4.1967

Problem:    Falling back from NFA to old regexp engine does not work properly.
            (fritzophrenic)
Solution:   Do not restore nfa_match. (Christian Brabandt, closes #867)

src/version.c

@@ -753,6 +753,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1967,
 /**/
     1966,
 /**/