Some leftover API files fixes

api/common.lua

@@ -30,7 +30,13 @@ industrialtest.api.hvPowerFlow=10200
 industrialtest.api.evPowerFlow=40800
 industrialtest.api.ivPowerFlow=163800
 
-industrialtest.internal.clamp=function(num,min,max)
+function industrialtest.internal.clamp(num,min,max)
 	return math.max(math.min(num,max),min)
 end
 
+-- \brief Returns machine speed in items per operation
+-- \param meta MetaDataRef
+-- \returns number
+function industrialtest.api.getMachineSpeed(meta)
+	return meta:contains("industrialtest.speed") and meta:get_int("industrialtest.speed") or 1
+end