Subject: hcom: fix writing on big endian 64bit architectures
From: Helmut Grohne <helmut () subdivi de>

On 64bit architectures, size_t is 64bit and casting a size_t pointer to an
int32_t pointer will yield the upper 32 bits, which are usually zero entirely.

--- a/src/hcom.c
+++ b/src/hcom.c
@@ -23,6 +23,7 @@
 #include "sox_i.h"
 #include <assert.h>
 #include <string.h>
+#include <stdint.h>
 #include <stdlib.h>
 #include <errno.h>
 
@@ -451,12 +452,19 @@
 {
   priv_t *p = (priv_t *) ft->priv;
   unsigned char *compressed_data = p->data;
-  size_t compressed_len = p->pos;
+  int32_t compressed_len;
   int rc = SOX_SUCCESS;
 
+  if (p->pos > INT32_MAX) {
+    free(p->data);
+    lsx_fail_errno(ft, ERANGE, "file too large for HCOM header");
+    return SOX_EOF;
+  }
+  compressed_len = p->pos;
+
   /* Compress it all at once */
   if (compressed_len)
-    compress(ft, &compressed_data, (int32_t *)&compressed_len);
+    compress(ft, &compressed_data, &compressed_len);
   free(p->data);
 
   /* Write the header */