Fix code warning.

Change-Id: Ib11fb49f528d3688351ae349d5b4e307c28b3967
diff --git a/mbtk/mbtk_gnssd/gnss_ipc.c b/mbtk/mbtk_gnssd/gnss_ipc.c
index 65db6a3..3bb1442 100755
--- a/mbtk/mbtk_gnssd/gnss_ipc.c
+++ b/mbtk/mbtk_gnssd/gnss_ipc.c
@@ -36,6 +36,8 @@
 static int sock_cli_fds[SOCK_CLIENT_MAX];
 
 int gnss_write(int fd, const void* buf, unsigned int buf_len);
+int gnss_agnss_get_eph(const void* param);
+
 
 static int gnss_cli_fd_find(int fd)
 {