From 7b87784eaf497a976b56be4fd169fb52c9bf7dea Mon Sep 17 00:00:00 2001
From: Mike Buland <mike@xagasoft.com>
Date: Sun, 21 Apr 2013 21:43:19 -0600
Subject: Corrected zero-length PackedIntArray bug.

If the array was zero elements long and then append was used it wouldn't
allocate memory, but it would try to write to a pointer.
---
 src/packedintarray.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/packedintarray.cpp b/src/packedintarray.cpp
index 5397a73..b91358e 100644
--- a/src/packedintarray.cpp
+++ b/src/packedintarray.cpp
@@ -207,14 +207,16 @@ void PackedIntArray::checkCapacity()
     {
 //        Bu::println("!!! Resizing !!!");
         Store *aOldData = aData;
-        int iNewSize = StoreCount(iCapacity*2);
+        int iNewSize = (iCapacity==0)?(bitsizeof(Store)/iBitWidth):(iCapacity=StoreCount(iCapacity*2));
+        while( iNewSize < iCount )
+            iNewSize *= 2;
         int iSize = StoreCount(iCapacity);
 //        Bu::println("  %1 => %2 (%3 bit words)").arg( iSize ).arg( iNewSize )
 //            .arg( StoreBits );
         aData = new Store[iNewSize];
         memset( aData, 0, iNewSize*sizeof(Store) );
         memcpy( aData, aOldData, iSize*sizeof(Store) );
-        iCapacity *= 2;
+        iCapacity = (iNewSize*bitsizeof(Store))/iBitWidth;
         delete[] aOldData;
     }
 }
-- 
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