Fixed all warnings.

sysdeps/linux/netload.c

@@ -112,8 +112,6 @@ glibtop_get_netload_s (glibtop *server, glibtop_netload *buf,
     skfd = socket (AF_INET, SOCK_DGRAM, 0);
     if (skfd) {
 	struct ifreq ifr;
-	struct sockaddr_in addr;
-	char *address;
 	unsigned flags;
 
 	strcpy (ifr.ifr_name, interface);

sysdeps/linux/ppp.c

@@ -31,6 +31,8 @@
 #include <sys/stat.h>
 #include <fcntl.h>
 
+#include <ctype.h>
+
 #include <glib.h>
 
 static const unsigned long _glibtop_sysdeps_ppp =