[6.0][6.1][7.0][trunk] Wrong module name on searching the 'code' translation

The code translation is not exported if you use a module path start with another module path
for exemple:
in conf file: addons_path = /home/syleam/openerp/addons,/home/syleam/openerp/addons-syleam
the module foo is in addons-syleam module path
When we export the translation, we search the name of the module in the function trans_generate/export_code_terms_from_file.
Whereas the name returned by the method get_module_from_path is 'syleam'. However 'syleam' is not one of the installed modules.
The get_module_from_path method uses the first module path found but this path isn't the correct path. The correct path is the second and the correct module name is foo.
The tests were performed on linux with the latest server revno for v 6.0. I looked in v 6.1 and the code is the same.