[PATCH-v2/RFC 2/6] xutils: fix hash with whitespace on incomplete line

[Thell Fowler <git@tbfowler.name>]

  - Make xdl_hash_record_with_whitespace stop hashing before the
    eof when ignoring space change or space at eol on an incomplete
    line.

  Resolves issue with a final trailing space being included in the
  hash on an incomplete line by treating the eof in the same fashion
  as a newline.

Signed-off-by: Thell Fowler <git@tbfowler.name>
---
 xdiff/xutils.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/xdiff/xutils.c b/xdiff/xutils.c
index 04ad468..c6512a5 100644
--- a/xdiff/xutils.c
+++ b/xdiff/xutils.c
@@ -248,12 +248,12 @@ static unsigned long xdl_hash_record_with_whitespace(char const **data,
 			if (flags & XDF_IGNORE_WHITESPACE)
 				; /* already handled */
 			else if (flags & XDF_IGNORE_WHITESPACE_CHANGE
-					&& ptr[1] != '\n') {
+					&& ptr[1] != '\n' && ptr + 1 < top) {
 				ha += (ha << 5);
 				ha ^= (unsigned long) ' ';
 			}
 			else if (flags & XDF_IGNORE_WHITESPACE_AT_EOL
-					&& ptr[1] != '\n') {
+					&& ptr[1] != '\n' && ptr + 1 < top) {
 				while (ptr2 != ptr + 1) {
 					ha += (ha << 5);
 					ha ^= (unsigned long) *ptr2;
-- 
1.6.4.176.g556a4