fix guard

Change-Id: If7787ca67f3c0d45ac0425a12719e92e0040bcc3
Reviewed-on: https://gerrit.libreoffice.org/33518
Reviewed-by: Michael Stahl <mstahl@redhat.com>
Tested-by: Michael Stahl <mstahl@redhat.com>
diff --git a/vcl/source/gdi/svmconverter.cxx b/vcl/source/gdi/svmconverter.cxx
index d9aae46..89e6c5b 100644
--- a/vcl/source/gdi/svmconverter.cxx
+++ b/vcl/source/gdi/svmconverter.cxx
@@ -923,7 +923,7 @@ void SVMConverter::ImplConvertFromSVM1( SvStream& rIStm, GDIMetaFile& rMtf )
                            nDXAryLen = std::max(nAryLen, nStrLen);
                            pDXAry.reset(new long[nDXAryLen]);

                            if (nDXAryLen <= nLen)
                            if (nDXAryLen < nLen)
                            {
                                //MetaTextArrayAction ctor expects pDXAry to be >= nLen if set, so if this can't
                                //be achieved, don't read it, it's utterly broken.