Merge pull request #423 from terrelln/exec-seq-patch

Fix small bug in ZSTD_execSequence()

lib/decompress/zstd_decompress.c

@@ -882,7 +882,7 @@ size_t ZSTD_execSequence(BYTE* op,
             sequence.matchLength -= length1;
             match = base;
             if (op > oend_w) {
-              memmove(op, match, sequence.matchLength);
+              while (op < oMatchEnd) *op++ = *match++;
               return sequenceLength;
             }
     }   }