Another one fix for MSVS2017

AlexeyAB

2018-08-14 7f9145729c2a2b64a7aeb3806f7c3d21771fce94

 src/layer.h

@@ -179,6 +179,10 @@
    float *weights;
    float *weight_updates;

    char *align_bit_weights;
    float *mean_arr;
    int lda_align;

    float *col_image;
    int   * input_layers;
    int   * input_sizes;