Bug fixes. Tested im2col_cpu_custom_transpose - bad way.

AlexeyAB

2018-08-10 a9fef1bd66e6b2c40c344c1bdcd33bb1d209461c

 src/layer.c

@@ -33,6 +33,8 @@
   if (l.scale_updates)      free(l.scale_updates);
   if (l.weights)            free(l.weights);
   if (l.weight_updates)     free(l.weight_updates);
    if (l.weights)            free(l.align_bit_weights);
    if (l.weights)            free(l.mean_arr);
   if (l.delta)              free(l.delta);
   if (l.output)             free(l.output);
   if (l.squared)            free(l.squared);