Fix a warning

./tcpdump.c:1940:15: warning: assigning to 'char *' from 'const char [5]'
discards qualifiers [-Wincompatible-pointer-types-discards-qualifiers]
                        chroot_dir = WITH_CHROOT;
                                   ^ ~~~~~~~~~~~

1 files changed, 1 insertions, 1 deletions

diff --git a/tcpdump.c b/tcpdump.c
index c9ce7fcd..ba154278 100644
--- a/tcpdump.c
+++ b/tcpdump.c
@@ -1447,7 +1447,7 @@ main(int argc, char **argv)
 	char ebuf[PCAP_ERRBUF_SIZE];
 	char VFileLine[PATH_MAX + 1];
 	char *username = NULL;
-	char *chroot_dir = NULL;
+	const char *chroot_dir = NULL;
 	char *ret = NULL;
 	char *end;
 #ifdef HAVE_PCAP_FINDALLDEVS