Compile error fix

src/network.c

@@ -775,8 +775,12 @@ void fuse_conv_batchnorm(network net)
 				}
 
 				l->batch_normalize = 0;
+#ifdef GPU
+				if (gpu_index >= 0) {
 					push_convolutional_layer(*l);
 				}
+#endif
+			}
 		}
 		else {
 			printf(" Skip layer: %d \n", l->type);