don't use children().size() but numPrimaries() to find out if a partition table

is empty.

svn path=/trunk/extragear/sysadmin/partitionmanager/; revision=1097659

TODO

@@ -20,5 +20,3 @@ Random plans and ideas for 1.1 and beyond:
 
 Bugs:
 
-* Creating a msdos partition table with cylinder alignment off still creates it
-  will cylinder alignment

src/core/partitiontable.cpp

@@ -659,7 +659,7 @@ bool PartitionTable::isSectorBased() const
 	if (type() == PartitionTable::msdos)
 	{
 		// user has turned cylinder based alignment off and partition table is empty
-		if (Config::useCylinderAlignment() == false && children().size() == 0)
+		if (Config::useCylinderAlignment() == false && numPrimaries() == 0)
 			return true;
 
 		// if not all partitions start at a point evenly divisable by sectorAlignment it's