Do not dump test patterns

tests/check_buffer_sizes.c

@@ -77,6 +77,7 @@ int main (void)
     struct aec_stream strm;
     struct test_state state;
 
+    state.dump = 0;
     state.buf_len = state.ibuf_len = BUF_SIZE;
     state.cbuf_len = 2 * BUF_SIZE;
 

tests/check_long_fs.c

@@ -32,6 +32,7 @@ int main (void)
     struct aec_stream strm;
     struct test_state state;
 
+    state.dump = 0;
     state.buf_len = state.ibuf_len = BUF_SIZE;
     state.cbuf_len = 2 * BUF_SIZE;