Changed the type of the waveform ID to force it as unsigned char.

pattern_frame_buffer/include/waveform_patterns.h

@@ -35,7 +35,7 @@ typedef union{
 #pragma pack (push, 1)
 typedef struct
 {
-  wf_id_t waveform_id;
+  unsigned char waveform_id;
   TPixelRGB max;
   TPixelRGB min;
   unsigned short int period;