Updates of CESNET plugin

- fixed permissions of scripts
- print failed CUDA command

cesnet/cesnet.cpp

@@ -146,7 +146,7 @@ void cesnet_set_render_buffer_rgba(unsigned char *rgba, int width, int height) {
 
 #else
 
-#define CUDA_CHECK(cmd) do { cudaError_t err = cmd; if (err != cudaSuccess) { fprintf(stderr, "%s\n", cudaGetErrorString(err)); } } while(0)
+#define CUDA_CHECK(cmd) do { cudaError_t err = cmd; if (err != cudaSuccess) { fprintf(stderr, "%s: %s\n", #cmd, cudaGetErrorString(err)); } } while(0)
 // rendering buffer - results in YUV I420 format
 void cesnet_set_render_buffer_yuv_i420(unsigned char *y, unsigned char *u, unsigned char *v, int width, int height) {
 	//printf("cesnet_set_render_buffer_yuv_i420: %d %d %d\n", y[0], u[0], v[0]);

ultragrid/run.sh

 #!/bin/sh -eu
 
-ultragrid/bin/uv -t cuda -c GPUJPEG $1
+ultragrid/bin/uv -t cuda -c GPUJPEG ${1?receiver address needs to be set as a first parameter}