patch 7.4.1678

Problem:    Warning for unused argument.
Solution:   Add UNUSED. (Dominique Pelle)

src/if_mzsch.c

@@ -1073,7 +1073,7 @@ load_base_module(void *data)
 }
 
     static Scheme_Object *
-load_base_module_on_error(void *data)
+load_base_module_on_error(void *data UNUSED)
 {
     load_base_module_failed = TRUE;
     return scheme_null;

src/version.c

@@ -748,6 +748,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1678,
 /**/
     1677,
 /**/