fix compilation error when targeting esp-idf

src/procedures.c

@@ -400,12 +400,12 @@ void broadcastPlayerMetadata (PlayerData *player) {
     {
       0,                   // Index (Entity Bit Mask)
       0,                   // Type (Byte)
-      entity_bit_mask, // Value
+      { entity_bit_mask }, // Value
     },
     {
       6,        // Index (Pose),
       21,       // Type (Pose),
-      pose, // Value (Standing)
+      { pose }, // Value (Standing)
     }
   };
 
@@ -439,7 +439,7 @@ void broadcastMobMetadata (int client_fd, int entity_id) {
       metadata[0] = (EntityData){
         17,                // Index (Sheep Bit Mask),
         0,                 // Type (Byte),
-        (uint8_t)0x10, // Value
+        { (uint8_t)0x10 }, // Value
       };
       length = 1;