fix compilation

src/kernel/version.c

@@ -3,6 +3,7 @@
 #endif
 #include "version.h"
 
+#include <assert.h>
 #include <stdio.h>
 
 #ifndef ERESSEA_VERSION

src/orderfile.c

@@ -223,12 +223,6 @@ int read_orders(input *in)
     return 0;
 }
 
-static const char * file_getbuf(void *data)
-{
-    FILE *F = (FILE *)data;
-    return getbuf(F);
-}
-
 typedef struct parser_state {
     unit *u;
     faction *f;