bugfix: length type too short

On a setup, length of cellGroupConfig was > 255.

Using uint8_t to store the length is thus wrong
and gives a bad encoding of the cellGroupConfig.

So let's use uint32_t to store length instead of uint8_t.

openair2/COMMON/f1ap_messages_types.h

@@ -358,11 +358,11 @@ typedef struct cu_to_du_rrc_information_s {
 
 typedef struct du_to_du_rrc_information_s {
   uint8_t * cellGroupConfig;
-  uint8_t   cellGroupConfig_length;
+  uint32_t  cellGroupConfig_length;
   uint8_t * measGapConfig;
-  uint8_t   measGapConfig_length;
+  uint32_t  measGapConfig_length;
   uint8_t * requestedP_MaxFR1;
-  uint8_t   requestedP_MaxFR1_length;
+  uint32_t  requestedP_MaxFR1_length;
 }du_to_cu_rrc_information_t;
 
 typedef enum QoS_information_e {