Fix variable shadowing in qt/receiverequestdialog.cpp
Fix variable shadowing in qt/receiverequestdialog.cpp

qt/receiverequestdialog.cpp:108:51: warning: declaration shadows a field of 'ReceiveRequestDialog' [-Wshadow]
void ReceiveRequestDialog::setModel(OptionsModel *model)
                                                  ^
./qt/receiverequestdialog.h:71:19: note: previous declaration is here
    OptionsModel *model;
                  ^

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