IndexPack: Use byte limited form of getCachedBytes

Currently our algorithm requires that we have the delta base as
a contiguous byte array... but getCachedBytes() might not work
if the object is considered to be large by its underlying loader.
Use the limited form to obtain the object as a byte array instead.

Change-Id: I33f12a8811cb6a4a67396174733f209db8119b42
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

org.eclipse.jgit/src/org/eclipse/jgit/transport/IndexPack.java

@@ -613,7 +613,7 @@ public class IndexPack {
 				missing.add(baseId);
 				continue;
 			}
-			final byte[] data = ldr.getCachedBytes();
+			final byte[] data = ldr.getCachedBytes(Integer.MAX_VALUE);
 			final int typeCode = ldr.getType();
 			final PackedObjectInfo oe;
 
@@ -870,7 +870,7 @@ public class IndexPack {
 
 		try {
 			final ObjectLoader ldr = readCurs.open(id, type);
-			final byte[] existingData = ldr.getCachedBytes();
+			final byte[] existingData = ldr.getCachedBytes(Integer.MAX_VALUE);
 			if (!Arrays.equals(data, existingData)) {
 				throw new IOException(MessageFormat.format(JGitText.get().collisionOn, id.name()));
 			}