fix web plugin panda3d.* import issue on windows

makepanda/makepanda.py

@@ -1660,7 +1660,10 @@ CreatePandaVersionFiles()
 if (PkgSkip("PYTHON")==0):
     CopyTree(GetOutputDir()+'/direct', 'direct/src')
     ConditionalWriteFile(GetOutputDir() + '/direct/__init__.py', "")
-    CopyFile(GetOutputDir()+'/lib/panda3d.py', 'direct/src/ffi/panda3d.py')
+    if (sys.platform.startswith("win")):
+        CopyFile(GetOutputDir()+'/bin/panda3d.py', 'direct/src/ffi/panda3d.py')
+    else:
+        CopyFile(GetOutputDir()+'/lib/panda3d.py', 'direct/src/ffi/panda3d.py')
 
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