Fix Linux build for GeckofxHtmlToPdf program
Fix Linux build for GeckofxHtmlToPdf program

(This problem has existed since October!)

hatton/geckofxHtmlToPdf,hatton/geckofxHtmlToPdf,StephenMcConnel/geckofxHtmlToPdf,StephenMcConnel/geckofxHtmlToPdf,StephenMcConnel/geckofxHtmlToPdf