Fixes error compiling with gcc-3.4.0:

 os/os_oflags.c: In function `__db_oflags':

 os/os_oflags.c:48: error: label at end of compound statement

 make[2]: *** [/home/dank/wk/crosstool-0.28-rc4h/build/i686-unknown-linux-gnu/gcc-3.4.0-20040406-glibc-2.1.3/build-glibc/db2/os_oflags.os] Error 1

 --- glibc-2.1.3/db2/os/os_oflags.c.old	Sun Apr 11 19:56:44 2004

 +++ glibc-2.1.3/db2/os/os_oflags.c	Sun Apr 11 19:57:06 2004

 @@ -44,7 +44,7 @@

  	case O_RDWR:

  		break;

  	default:		/* Bogus flags value from user.  */

 -	  /* XXX no way to return error from here */

 +		; /* XXX no way to return error from here */

  	}

  	if (oflags & O_CREAT)

  		dbflags |= DB_CREATE;