AP_Scripting: fix language check issues

Author: IamPete1

libraries/AP_Scripting/applets/net-ntrip.lua

@@ -99,7 +99,7 @@ local function process_rtcm_buffer()
         if send_debug_msg_count then
             local message_type = (rtcm_buffer:byte(4) << 4) | (rtcm_buffer:byte(5) >> 4)
             msg_count[message_type] = (msg_count[message_type] or 0) + 1
-            gcs:send_named_float(message_type, msg_count[message_type])
+            gcs:send_named_float(tostring(message_type), msg_count[message_type])
         end
 
         local complete_message = rtcm_buffer:sub(1, total_length)

libraries/AP_Scripting/applets/quadplane_terrain_avoid.lua

@@ -960,6 +960,11 @@ while (distance > 0) {
 -------------------------------------------------------------------------------
 -- Lookahead functions - replaces the c++ functions in AP_Terrain
 -------------------------------------------------------------------------------
+---@param start_location Location_ud
+---@param search_bearing number
+---@param search_distance number
+---@param search_ratio number
+---@return Location_ud|nil
 function Terrain_Lookahead(start_location, search_bearing, search_distance, search_ratio)
     local highest_location = nil
     local climb = 0.0

libraries/AP_Scripting/examples/plane-wind-fs.lua

@@ -64,7 +64,7 @@ value = param:get('RTL_RADIUS')
 if value then
   value = math.abs(value)
   if value > 0 then
-    home_reached_rad = math.abs(value) * 2
+    home_reached_rad = value * 2
   else 
     value = param:get('WP_LOITER_RAD')
     if value then

libraries/AP_Scripting/examples/rover-motor-driver.lua

@@ -29,6 +29,10 @@ function update()
       if throttle < 0 then
           steering = -steering
       end
+
+      -- Language checker thinks steering could be nil, reassure it that it cannot
+      ---@cast steering number
+
       SRV_Channels:set_output_norm(K_SCRIPTING1, steering)
       SRV_Channels:set_output_norm(K_SCRIPTING3, throttle)
     end