Use a plain old int for rpmfiArchiveReadToFile() nodigest argument

- There's no benefit to using char here, and int is what is generally
  used for such (flag-type) arguments.
- As it happens char doesn't even work here as the nodigest argument
  passed from fsm is not a simple 0/1 value but result of
  (rpmtsFlags(ts) & RPMTRANS_FLAG_NOFILEDIGEST), which when crammed
  into a char actually turns into a zero... so this unbreaks
  --nofiledigest

lib/rpmfi.c

@@ -1799,7 +1799,7 @@ size_t rpmfiArchiveRead(rpmfi fi, void * buf, size_t size)
     return rpmcpioRead(fi->archive, buf, size);
 }
 
-int rpmfiArchiveReadToFile(rpmfi fi, FD_t fd, char nodigest)
+int rpmfiArchiveReadToFile(rpmfi fi, FD_t fd, int nodigest)
 {
     if (fi == NULL || fi->archive == NULL || fd == NULL)
 	return -1;

lib/rpmfi_internal.h

@@ -268,7 +268,7 @@ size_t rpmfiArchiveRead(rpmfi fi, void * buf, size_t size);
  * @param nodigest	ommit checksum check if > 0
  * @return		> 0 on error
  */
-int rpmfiArchiveReadToFile(rpmfi fi, FD_t fd, char nodigest);
+int rpmfiArchiveReadToFile(rpmfi fi, FD_t fd, int nodigest);
 
 #ifdef __cplusplus
 }