Merge branch 'js/misc-fixes' into maint

Various compilation fixes and squelching of warnings.

* js/misc-fixes:
  Correct fscanf formatting string for I64u values
  Silence GCC's "cast of pointer to integer of a different size" warning
  Squelch warning about an integer overflow

sha1_file.c

@@ -2137,7 +2137,7 @@ static unsigned long pack_entry_hash(struct packed_git *p, off_t base_offset)
 {
 	unsigned long hash;
 
-	hash = (unsigned long)p + (unsigned long)base_offset;
+	hash = (unsigned long)(intptr_t)p + (unsigned long)base_offset;
 	hash += (hash >> 8) + (hash >> 16);
 	return hash % MAX_DELTA_CACHE;
 }