(svn r25506) -Document: a function, and name it slightly better

src/os/os2/os2.cpp

@@ -172,7 +172,7 @@ int CDECL main(int argc, char *argv[])
 {
 	SetRandomSeed(time(NULL));
 
-	return ttd_main(argc, argv);
+	return openttd_main(argc, argv);
 }
 
 bool GetClipboardContents(char *buffer, size_t buff_len)

src/os/unix/unix.cpp

@@ -272,7 +272,7 @@ int CDECL main(int argc, char *argv[])
 
 	signal(SIGPIPE, SIG_IGN);
 
-	ret = ttd_main(argc, argv);
+	ret = openttd_main(argc, argv);
 
 #ifdef WITH_COCOA
 	cocoaReleaseAutoreleasePool();

src/os/windows/win32.cpp

@@ -462,7 +462,7 @@ int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLi
 
 	argc = ParseCommandLine(cmdline, argv, lengthof(argv));
 
-	ttd_main(argc, argv);
+	openttd_main(argc, argv);
 	return 0;
 }