Merge pull request #181 from SquidDev-CC/hotfix/gps-locate

Ensure GPS coordinates are numbers

src/main/resources/assets/computercraft/lua/rom/apis/gps

@@ -103,7 +103,7 @@ function locate( _nTimeout, _bDebug )
 			local sSide, sChannel, sReplyChannel, tMessage, nDistance = p1, p2, p3, p4, p5
 			if sSide == sModemSide and sChannel == os.getComputerID() and sReplyChannel == CHANNEL_GPS and nDistance then
 				-- Received the correct message from the correct modem: use it to determine position
-				if type(tMessage) == "table" and #tMessage == 3 then
+				if type(tMessage) == "table" and #tMessage == 3 and tonumber(tMessage[1]) and tonumber(tMessage[2]) and tonumber(tMessage[3]) then
 					local tFix = { vPosition = vector.new( tMessage[1], tMessage[2], tMessage[3] ), nDistance = nDistance }
 					if _bDebug then
 						print( tFix.nDistance.." metres from "..tostring( tFix.vPosition ) )

src/main/resources/assets/computercraft/lua/rom/apis/vector

@@ -76,9 +76,9 @@ local vmetatable = {
 
 function new( x, y, z )
 	local v = {
-		x = x or 0,
-		y = y or 0,
-		z = z or 0
+		x = tonumber(x) or 0,
+		y = tonumber(y) or 0,
+		z = tonumber(z) or 0
 	}
 	setmetatable( v, vmetatable )
 	return v