Change various types to the correct signedness to avoid warnings.

Also cast the check of "inet_addr" to guint32. The POSIX declaration
of this function returns in_addr_t which is the same as uint32_t.
Windows does not define this type and instead uses unsigned long.

src/common/modes.c

@@ -680,7 +680,7 @@ handle_mode (server * serv, char *word[], char *word_eol[],
 	int len;
 	size_t arg;
 	size_t i, num_args;
-	int num_modes;
+	size_t num_modes;
 	size_t offset = 3;
 	int all_modes_have_args = FALSE;
 	int using_front_tab = FALSE;