minor fixes for LOG SENSE CDB and senseBuff size

Drive/Drive.hh

@@ -135,7 +135,7 @@ namespace Tape {
       std::vector<std::string> ret;
       /* We don't know how many elements we'll get. Prepare a 100 parameters array */
       SCSI::Structures::tapeAlertLogPage_t<100> tal;
-      unsigned char senseBuff[256];
+      unsigned char senseBuff[255];
       SCSI::Structures::logSenseCDB_t cdb;
       cdb.pageCode = SCSI::logSensePages::tapeAlert;
       SCSI::Structures::LinuxSGIO_t sgh;

SCSI/Structures.hh

@@ -225,13 +225,16 @@ namespace SCSI {
       unsigned char opCode;
       
       unsigned char SP : 1;
-      unsigned char : 7;
+      unsigned char PPC: 1;
+      unsigned char :6;
       
       unsigned char pageCode : 6;
       unsigned char PC : 2;
       
       unsigned char subPage;
       
+      unsigned char reserved;
+      
       unsigned char parameterPointer[2];
       
       unsigned char allocationLength[2];