I18N: Update translation (Portuguese (Portugal))

Currently translated at 18.9% (183 of 967 strings)

po/pt_PT.po

@@ -9,7 +9,7 @@ msgstr ""
 "Report-Msgid-Bugs-To: scummvm-devel@lists.scummvm.org\n"
 "POT-Creation-Date: 2018-04-15 19:57+0200\n"
 "PO-Revision-Date: 2018-04-18 14:06+0000\n"
-"Last-Translator: Fred Almeida <fred_pj@hotmail.com>\n"
+"Last-Translator: Adrian Frühwirth <bonki@scummvm.org>\n"
 "Language-Team: Portuguese (Portugal) "
 "<https://translations.scummvm.org/projects/scummvm/scummvm/pt_PT/>\n"
 "Language: pt_PT\n"
@@ -993,7 +993,7 @@ msgstr "SoundFont:"
 
 #: gui/options.cpp:1117
 msgid "Mixed AdLib/MIDI mode"
-msgstr "Modo misturado Adlib/MIDI"
+msgstr "Modo misturado AdLib/MIDI"
 
 #: gui/options.cpp:1117
 msgid "Use both MIDI and AdLib sound generation"