Lua fixes to work on Unix as well as windows.

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk@7433 626c5289-ae23-0410-ae9c-e8d60b6d4f22

SWIG/Examples/lua/variables/runme.lua

@@ -1,9 +1,12 @@
 -- file: example.lua
 
--- importing (lua doesnt have a nice way to do this)
-if example==nil then 
-	assert(loadlib("example.dll","Example_Init"))()
+-- importing (lua does not have a nice way to do this)
+loadlibrary = loadlib("example.so","Example_Init")
+if loadlibrary == nil then
+    loadlibrary = loadlib("example.dll","Example_Init")
 end
+assert(loadlibrary, "could not find dynamic libray")
+loadlibrary()
 
 -- Try to set the values of some global variables