ecjpake_zkp_read() now returns ...BAD_INPUT_DATA when r len == 0 and test follows that

Signed-off-by: TRodziewicz <tomasz.rodziewicz@mobica.com>
diff --git a/library/ecp.c b/library/ecp.c
index 6e866fa..d229a0a 100644
--- a/library/ecp.c
+++ b/library/ecp.c
@@ -2806,7 +2806,7 @@
 {
     int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
 
-    if ( mbedtls_mpi_cmp_int( m, 0 ) == 0 )
+    if( mbedtls_mpi_cmp_int( m, 0 ) == 0 )
     {
         MBEDTLS_MPI_CHK( mbedtls_ecp_set_zero( R ) );
     }