patch 7.4.1478

Problem:    ":loadplugin" doesn't take care of ftdetect files.
Solution:   Also load ftdetect scripts when appropriate.

src/version.c

@@ -743,6 +743,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1478,
 /**/
     1477,
 /**/