tests/server: make string literals const

assign string literals to const char * instead of char * in order to
avoid a lot of these warnings:
cast from 'const char *' to 'char *' drops const qualifier
[-Wcast-qual]

1 files changed, 1 insertions, 1 deletions

diff --git a/tests/server/rtspd.c b/tests/server/rtspd.c
index ea231da3d..ae42f5a5f 100644
--- a/tests/server/rtspd.c
+++ b/tests/server/rtspd.c
@@ -1190,7 +1190,7 @@ int main(int argc, char *argv[])
   int wrotepidfile = 0;
   int flag;
   unsigned short port = DEFAULT_PORT;
-  char *pidname= (char *)".rtsp.pid";
+  const char *pidname = ".rtsp.pid";
   struct httprequest req;
   int rc;
   int error;