i18n: fr: fix erroneous translation

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

po/fr.po

@@ -17012,7 +17012,7 @@ msgstr "Codecs audio"
 
 #: modules/gui/macosx/ConvertAndSave.m:176 modules/gui/qt4/ui/profiles.h:710
 msgid "Keep original video track"
-msgstr "Conserver la taille originale de la piste vidéo"
+msgstr "Conserver la piste vidéo originale"
 
 #: modules/gui/macosx/ConvertAndSave.m:181 modules/gui/qt4/ui/profiles.h:723
 msgid ""
@@ -21360,7 +21360,7 @@ msgstr ""
 
 #: modules/gui/qt4/dialogs/plugins.cpp:408
 msgid "Only installed"
-msgstr "Installer seulement"
+msgstr "Installés seulement"
 
 #: modules/gui/qt4/dialogs/plugins.cpp:503
 msgid "Retrieving addons..."