Set language to C (English)

Otherwise the "(disc 2)" part of the test may fail

tests/musicbrainztest-severaldiscs.cpp

@@ -11,6 +11,12 @@
 #include "config-musicbrainz.h"
 #include <QTest>
 
+static void setEnvironment()
+{
+    qputenv("LANG", "C.UTF-8");
+    qputenv("LANGUAGE", "C.UTF-8");
+}
+
 void MusicBrainzTestSeveralDiscs::testLookup()
 {
   using namespace KCDDB;
@@ -121,4 +127,6 @@ void MusicBrainzTestSeveralDiscs::testLookup()
   }
 }
 
+Q_COREAPP_STARTUP_FUNCTION(setEnvironment)
+
 QTEST_GUILESS_MAIN(MusicBrainzTestSeveralDiscs)