Removed one null check

Author: QBobWatson

src/odb_loose.c

@@ -1028,12 +1028,11 @@ static int loose_backend__readstream(
 
 done:
 	if (error < 0) {
-                if(stream && stream->map.data)
+                if(stream) {
 		        git_futils_mmap_free(&stream->map);
-                if(stream)
    		        git_zstream_free(&stream->zstream);
-                if(stream)
                         git__free(stream);
+                }
                 if(hash_ctx) {
    		        git_hash_ctx_cleanup(hash_ctx);
 		        git__free(hash_ctx);