jclhuff.c: Fix innocuous UBSan left shift warning

This applies the progressive Huffman encoder fixes from
aa769febf2 and
d65e768b2e to the new lossless mode
Huffman encoder.

jclhuff.c

@@ -43,7 +43,7 @@
  */
 
 typedef struct {
-  JLONG put_buffer;             /* current bit-accumulation buffer */
+  size_t put_buffer;            /* current bit-accumulation buffer */
   int put_bits;                 /* # of bits now in it */
 } savable_state;
 
@@ -246,14 +246,14 @@ emit_bits(working_state *state, unsigned int code, int size)
 /* Emit some bits; return TRUE if successful, FALSE if must suspend */
 {
   /* This routine is heavily used, so it's worth coding tightly. */
-  register JLONG put_buffer = (JLONG)code;
+  register size_t put_buffer = (size_t)code;
   register int put_bits = state->cur.put_bits;
 
   /* if size is 0, caller used an invalid Huffman table entry */
   if (size == 0)
     ERREXIT(state->cinfo, JERR_HUFF_MISSING_CODE);
 
-  put_buffer &= (((JLONG)1) << size) - 1; /* mask off any extra bits in code */
+  put_buffer &= (((size_t)1) << size) - 1; /* mask off any extra bits in code */
 
   put_bits += size;             /* new number of bits in buffer */