MemoryTracking: adjust initialization calling

Calling of curl_memdebug() was still done with a pending free()

lib/memdebug.h

@@ -32,14 +32,12 @@
 
 #include <curl/curl.h>
 
-#ifdef HAVE_SYS_TYPES_H
-#include <sys/types.h>
-#endif
-
 #ifdef HAVE_SYS_SOCKET_H
 #include <sys/socket.h>
 #endif
 
+#define CURL_MT_LOGFNAME_BUFSIZE 512
+
 #define logfile curl_debuglogfile
 
 extern FILE *logfile;