avoid crash in multiplayer if allow_ownship_export is off

This disables the CommonData exports when on a MP server where the
"Allow Player Export" option is turned off, so the rest of the exports
continue to work.

The exports on the CommonData module rely on values from LoGetSelfData()
that are only available when allow_ownship_export is on.

Scripts/DCS-BIOS/lib/CommonData.lua

@@ -9,6 +9,9 @@ local altFt
 local hdgDeg
 local hdgDegFrac
 moduleBeingDefined.exportHooks[#moduleBeingDefined.exportHooks+1] = function()
+	-- skip  this data if ownship export is disabled
+	if not LoIsOwnshipExportAllowed() then return end
+
 	local selfData = LoGetSelfData()
 	if selfData.LatLongAlt == nil then return end
 	altFt = selfData.LatLongAlt.Alt / 0.3048
@@ -38,15 +41,27 @@ end
 
 defineIntegerFromGetter("LAT_DEG", function() return latDeg end, 59, "Position", "Latitude Degrees")
 defineIntegerFromGetter("LAT_SEC", function() return latSec end, 59, "Position", "Latitude Seconds")
-defineIntegerFromGetter("LAT_SEC_FRAC", function() return math.floor(latFractionalSec*65535) end, 65535, "Position", "Latitude Fractional Seconds (divide by 65535)")
+defineIntegerFromGetter("LAT_SEC_FRAC", function()
+	if not LoIsOwnshipExportAllowed() then return nil end
+	return math.floor(latFractionalSec*65535)
+end, 65535, "Position", "Latitude Fractional Seconds (divide by 65535)")
 
 defineIntegerFromGetter("LON_DEG", function() return lonDeg end, 59, "Position", "Longitude Degrees")
 defineIntegerFromGetter("LON_SEC", function() return lonSec end, 59, "Position", "Longitude Seconds")
-defineIntegerFromGetter("LON_SEC_FRAC", function() return math.floor(lonFractionalSec*65535) end, 65535, "Position", "Longitude Fractional Seconds (divide by 65535)")
+defineIntegerFromGetter("LON_SEC_FRAC", function()
+	if not LoIsOwnshipExportAllowed() then return nil end
+	return math.floor(lonFractionalSec*65535)
+end, 65535, "Position", "Longitude Fractional Seconds (divide by 65535)")
 
-defineIntegerFromGetter("ALT_MSL_FT", function() return math.floor(altFt) end, 65535, "Altitude", "Altitude MSL (ft)")
+defineIntegerFromGetter("ALT_MSL_FT", function()
+	if not LoIsOwnshipExportAllowed() then return nil end
+	return math.floor(altFt)
+end, 65535, "Altitude", "Altitude MSL (ft)")
 
 defineIntegerFromGetter("HDG_DEG", function() return hdgDeg end, 360, "Heading", "Heading (Degrees)")
-defineIntegerFromGetter("HDG_DEG_FRAC", function() return hdgDegFrac * 127 end, 127, "Heading", "Heading (Fractional Degrees, divide by 127)")
+defineIntegerFromGetter("HDG_DEG_FRAC", function()
+	if not LoIsOwnshipExportAllowed() then return nil end
+	return hdgDegFrac * 127
+end, 127, "Heading", "Heading (Fractional Degrees, divide by 127)")
 
 BIOS.protocol.endModule()

Scripts/DCS-BIOS/lib/Util.lua

@@ -89,6 +89,9 @@ BIOS.util.MemoryAllocation = {
 	multiplier = nil
 }
 function BIOS.util.MemoryAllocation:setValue(value)
+	-- ignore nil values (on MP servers with player export disabled, some values are not available)
+	if value == nil then return end
+
 	assert(self.maxValue)
 	assert(value)
 	value = math.floor(value)