[FIX] tools: handle code in po

The previous code, as explained at b505ba9e0a, was to avoid creating duplicated
code entries for the same source (as only one is considered).

In case of a po comment like
 #. openerp-web
 #: model:ir.ui.view,arch_db:base.ir_access_view_search
 #: code:addons/web/static/src/js/chrome/search_inputs.js:716
 #: code:addons/web/static/src/xml/base.xml:1125
 #, python-format

the condition was not triggered (trans_type is model), creating two code entries

Necessary in #26614 to fix #26553

odoo/tools/translate.py

@@ -584,8 +584,11 @@ class PoFile(object):
                 # end of this next() call), and keep the others to generate
                 # additional entries (returned the next next() calls).
                 trans_type, name, res_id = targets.pop(0)
+                code = False
                 for t, n, r in targets:
-                    if t == trans_type == 'code': continue
+                    if t == 'code' and code: continue
+                    if t == 'code':
+                        code = True
                     self.extra_lines.append((t, n, r, source, trad, comments))
 
         if name is None: