libgtpnl: tools: fix compilation of gtp-link-add
A typo slipped through into that file and it stopped compiling.
diff --git a/tools/gtp-link-add.c b/tools/gtp-link-add.c
index 0038b9e..833a3b2 100644
--- a/tools/gtp-link-add.c
+++ b/tools/gtp-link-add.c
@@ -36,7 +36,7 @@
ifm->ifi_flags |= IFF_UP;
fprintf(stderr, "WARNING: attaching dummy socket descriptors. Use "
- "this command for testing purposes only.\n"):
+ "this command for testing purposes only.\n");
int fd1 = socket(AF_INET, SOCK_DGRAM, 0);
int fd2 = socket(AF_INET, SOCK_DGRAM, 0);