Typedefs starting with `x' in darwin01

• x0000B802 bsd/hfs/hfscommon/headers/system/MacOSStubs.h:398
• XCInfoPBPtr bsd/dev/ppc/drvUSBCMD/files.h:543
• XIOParamPtr bsd/dev/ppc/drvUSBCMD/files.h:849
• XVolumeParamPtr bsd/dev/ppc/drvUSBCMD/files.h:888