File include1.diff of Package qpopper

--- popper/pop_dropcopy.c
+++ popper/pop_dropcopy.c
@@ -164,6 +164,7 @@
 #include <ctype.h>
 #include <string.h>
 #include <flock.h>
+#include <grp.h>
 
 #include "config.h"
 #include "md5.h"