Fixed a bug in hash ME when it is used in intrabc

Change-Id: I4f158dd15e4a7a8abb27ad0ad6aed6f8f9fce4f6

av1/encoder/mcomp.c

diff --git a/av1/encoder/mcomp.c b/av1/encoder/mcomp.c
index 49d6e67..eb32edd 100644
--- a/av1/encoder/mcomp.c
+++ b/av1/encoder/mcomp.c
@@ -2596,7 +2596,7 @@
 
         const int count = av1_hash_table_count(ref_frame_hash, hash_value1);
         // for intra, at lest one matching can be found, itself.
-        if (count == (intra ? 1 : 0)) {
+        if (count <= (intra ? 1 : 0)) {
           break;
         }