Using TextToPDF to create a PDF from the empty string produces unreadble PDF 
file (patch included)
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                 Key: PDFBOX-914
                 URL: https://issues.apache.org/jira/browse/PDFBOX-914
             Project: PDFBox
          Issue Type: Improvement
          Components: Utilities
    Affects Versions: 1.4.0
         Environment: All
            Reporter: Neil McErlean
             Fix For: 1.4.0


If you create a PDF document from org.apache.pdfbox.TextToPDF like so:
        TextToPDF pdfCreator = new TextToPDF();
        PDDocument pdfDoc = pdfCreator.createPDFFromText(new StringReader("")); 
// Note the empty String
then it does produce a PDF file. But the file cannot be opened as it contains 
no pages.
Adobe Reader (I have 9.4.1), and Mac OSX's Preview/Quicklook cannot open the 
document.

I have attached (or will do in a minute) a patch that includes a test case that 
reproduces the problem (no PDPages in a PDF with no text).
And I've patched TextToPDF so that it inserts a single empty page for an empty 
string input.


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