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Fix bug in deadlock detection

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Original file line number	Diff line number	Diff line change
`@@ -1724,7 +1724,7 @@ MtmSerializeLock(PROCLOCK* proclock, void* arg)`
`1724`	`1724`	`if ((proclock->holdMask&LOCKBIT_ON(lm))&& (conflictMask&LOCKBIT_ON(lm)))`
`1725`	`1725`	`{`
`1726`	`1726`	`MTM_TRACE("%d: %u(%u) waits for %u(%u)\n",MyProcPid,srcPgXact->xid,proc->pid,dstPgXact->xid,proclock->tag.myProc->pid);`
`1727`		`-MtmGetGtid(srcPgXact->xid,&gtid);/* transaction holding lock */`
	`1727`	`+MtmGetGtid(dstPgXact->xid,&gtid);/* transaction holding lock */`
`1728`	`1728`	`ByteBufferAppendInt32(buf,gtid.node);`
`1729`	`1729`	`ByteBufferAppendInt32(buf,gtid.xid);`
`1730`	`1730`	`break;`

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