Accept a const QWidget* in RichResource functions

qrenderdoc/Code/Interface/QRDInterface.cpp

@@ -132,7 +132,7 @@ QString ConfigFilePath(const QString &filename)
   return QDir::cleanPath(dir.absoluteFilePath(filename));
 }
 
-ICaptureContext *getCaptureContext(QWidget *widget)
+ICaptureContext *getCaptureContext(const QWidget *widget)
 {
   void *ctxptr = NULL;
 

qrenderdoc/Code/Interface/QRDInterface.h

@@ -1794,4 +1794,4 @@ This may return ``None`` if no capture context can be found.
 :return: The capture context associated with this widget, if one unambiguously exists.
 :rtype: CaptureContext
 )");
-ICaptureContext *getCaptureContext(QWidget *widget);
+ICaptureContext *getCaptureContext(const QWidget *widget);