Enable memory tracking on an environment variable.

git-svn-id: https://www.unprompted.com/svn/projects/tildefriends/trunk@4743 ed5197a5-7fde-0310-b194-c3ffbd925b24

src/main.c

@@ -594,7 +594,9 @@ static void _error_handler(int sig)
 
 static void _startup(int argc, char* argv[])
 {
-	bool tracking = false;
+	char buffer[8] = { 0 };
+	size_t buffer_size = sizeof(buffer);
+	bool tracking = uv_os_getenv("TF_MEM_TRACKING", buffer, &buffer_size) == 0 && strcmp(buffer, "1") == 0;
 	for (int i = 1; i < argc; i++)
 	{
 		if (strcmp(argv[i], "sandbox") == 0)