Skip the DLL check when running from a frozen app
Skip the DLL check when running from a frozen app

Fixes #675 (revisiting #177)

FrancescAlted/PyTables,FrancescAlted/PyTables,avalentino/PyTables,PyTables/PyTables,FrancescAlted/PyTables,avalentino/PyTables,PyTables/PyTables,PyTables/PyTables,avalentino/PyTables