bzip2: size reduction, to just below 9k.

diff --git a/archival/bz/huffman.c b/archival/bz/huffman.c
index d01af11..89e5460 100644
--- a/archival/bz/huffman.c
+++ b/archival/bz/huffman.c
@@ -68,7 +68,7 @@
 
 /*---------------------------------------------------*/
 static
-void BZ2_hbMakeCodeLengths(UChar *len,
+void BZ2_hbMakeCodeLengths(uint8_t *len,
 		int32_t *freq,
 		int32_t alphaSize,
 		int32_t maxLen)
@@ -163,7 +163,7 @@
 /*---------------------------------------------------*/
 static
 void BZ2_hbAssignCodes(int32_t *code,
-		UChar *length,
+		uint8_t *length,
 		int32_t minLen,
 		int32_t maxLen,
 		int32_t alphaSize)