Use more portable way to embed unicode character in OpenCL rendering (required by Windows)

src/pulsaranimationwidget.cpp

@@ -552,7 +552,7 @@ void PulsarAnimationWidget::paintGL()
             font.setBold(true);
             font.setFamily("Arial");
             font.setStyleStrategy((QFont::StyleStrategy) (QFont::OpenGLCompatible | QFont::PreferQuality));
-            renderText(10, 25, -100, QString::fromLocal8Bit("Copyright © 2009-2011"), font);
+            renderText(10, 25, -100, QString("Copyright %1 2009-2011").arg(QChar(0x00A9)), font);
             renderText(10, 10, -100, tr("Max Planck Institute for Gravitational Physics"), font);
 
             // render pulse "flash"