JUnit/SonarQube reporters use base's stream member

src/catch2/reporters/catch_reporter_junit.cpp

@@ -70,7 +70,7 @@ namespace Catch {
 
     JunitReporter::JunitReporter( ReporterConfig const& _config )
         :   CumulativeReporterBase( _config ),
-            xml( _config.stream() )
+            xml( m_stream )
         {
             m_preferences.shouldRedirectStdOut = true;
             m_preferences.shouldReportAllAssertions = true;

src/catch2/reporters/catch_reporter_sonarqube.hpp

@@ -18,7 +18,7 @@ namespace Catch {
 
         SonarQubeReporter(ReporterConfig const& config)
         : CumulativeReporterBase(config)
-        , xml(config.stream()) {
+        , xml(m_stream) {
             m_preferences.shouldRedirectStdOut = true;
             m_preferences.shouldReportAllAssertions = true;
             m_shouldStoreSuccesfulAssertions = false;