Remove NULL checks before freeing memory in ctc_context_destroy

theano/tensor/nnet/ctc_wrapper.c

@@ -26,16 +26,12 @@ void ctc_context_init(ctc_context_t * context)
 
 void ctc_context_destroy(ctc_context_t * context)
 {
-    if ( NULL != context->workspace )
     free( context->workspace );
 
-    if ( NULL != context->input_lengths )
     free( context->input_lengths );
 
-    if ( NULL != context->flat_labels )
     free( context->flat_labels );
 
-    if ( NULL != context->label_lengths )
     free( context->label_lengths );
 }