Support non-sequential partition index

Add support for the storage with non-sequential partition index
Ex: if using  extended partition, the index of the partition will be greater than 5

[toddpoynor@google.com: fixup mPendingPartCount data type]
Change-Id: I5dbc870fbaac24045f5b994fcb899d5df73c6a55
diff --git a/DirectVolume.h b/DirectVolume.h
index beda7c3..4495256 100644
--- a/DirectVolume.h
+++ b/DirectVolume.h
@@ -38,7 +38,7 @@
     int            mOrigDiskMinor;
     int            mOrigPartMinors[MAX_PARTITIONS];
     int            mDiskNumParts;
-    unsigned int   mPendingPartMap;
+    int            mPendingPartCount;
     int            mIsDecrypted;
 
 public: