Build: Fix with-extlibs option being required for compilation

Former-commit-id: 41219e06c9f0a05221440eefb6268222757af8e1 [formerly fdb27339a5b90fce1bbea576012c72c433615e23]
Former-commit-id: e979847fb2bc6d6f80b9fc02956d08113bae1e39

build/scripts/common.lua

@@ -15,7 +15,7 @@ function NazaraBuild:Execute()
 	if (self.Actions[_ACTION] == nil) then
 		local makeLibDir = os.is("windows") and "mingw" or "gmake"
 	
-		if (#self.OrderedExtLibs > 0) then
+        if (_OPTIONS["with-extlibs"]) then
 			workspace("NazaraExtlibs")
 			platforms(platformData)
 
@@ -494,7 +494,6 @@ function NazaraBuild:Initialize()
 	ACTION = nil
 
 	-- Extern libraries
-	if (_OPTIONS["with-extlibs"]) then
     local extlibs = os.matchfiles("../extlibs/build/*.lua")
     for k,v in pairs(extlibs) do
         local f, err = loadfile(v)
@@ -513,7 +512,6 @@ function NazaraBuild:Initialize()
         end
     end
     LIBRARY = nil
-	end
 
 	-- Then the modules
 	local modules = os.matchfiles("scripts/modules/*.lua")