Include "curl_memory.h" to get the strdup replacement when necessary

lib/rtsp.c

@@ -36,6 +36,7 @@
 #include "progress.h"
 #include "rtsp.h"
 #include "rawstr.h"
+#include "curl_memory.h"
 
 #define _MPRINTF_REPLACE /* use our functions only */
 #include <curl/mprintf.h>