Merge pull request #777 from terrelln/off-by-one

[LZ4_compress_destSize] Fix off-by-one error

lib/lz4.c

diff --git a/lib/lz4.c b/lib/lz4.c
index 877d14e..9808d70 100644
--- a/lib/lz4.c
+++ b/lib/lz4.c
@@ -1040,7 +1040,7 @@
                     ip -= matchCode - newMatchCode;
                     assert(newMatchCode < matchCode);
                     matchCode = newMatchCode;
-                    if (unlikely(ip < filledIp)) {
+                    if (unlikely(ip <= filledIp)) {
                         /* We have already filled up to filledIp so if ip ends up less than filledIp
                          * we have positions in the hash table beyond the current position. This is
                          * a problem if we reuse the hash table. So we have to remove these positions