Added a new PartitionMap::CountNonEmptyPartitions() - now, a partition map

is only accepted when there is at least one valid partition in it.
Before, the module would accept even the BFS boot loader which is now less
likely (IOW you can now boot with Bochs again).
Also, if there was one invalid partition, the partitions that come after
it are no longer ignored.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@12228 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/add-ons/kernel/partitioning_systems/intel/PartitionMap.cpp

@@ -327,6 +327,19 @@ PartitionMap::CountPartitions() const
 	return count;
 }
 
+// CountNonEmptyPartitions
+int32 
+PartitionMap::CountNonEmptyPartitions() const
+{
+	int32 count = 0;
+	for (int32 i = CountPartitions() - 1; i >= 0; i--) {
+		if (!PartitionAt(i)->IsEmpty())
+			count++;
+	}
+
+	return count;
+}
+
 // PartitionAt
 Partition *
 PartitionMap::PartitionAt(int32 index)