fix wrong use of strncat

code/client/cl_curl.c

@@ -131,8 +131,8 @@ qboolean CL_cURL_Init()
 #else
 		char fn[1024];
 		getcwd(fn, sizeof(fn));
-		strncat(fn, "/", sizeof(fn));
-		strncat(fn, cl_cURLLib->string, sizeof(fn));
+		strncat(fn, "/", sizeof(fn)-strlen(fn)-1);
+		strncat(fn, cl_cURLLib->string, sizeof(fn)-strlen(fn)-1);
 
 		if( (cURLLib = OBJLOAD(fn)) == 0 )
 		{