fix OOXML validation error, related fdo#42698

Missing percentage sign in type. The values of XML_d and XML_sp seem
insane.

Change-Id: If6762ed70d3536c0eeea3ee687991dad60f5e71e

include/oox/export/utils.hxx

@@ -48,6 +48,12 @@ static inline sal_Int64 TwipsToEMU( sal_Int32 nTwips )
     return sal_Int64( nTwips ) * 635;
 }
 
+template <typename T>
+OString writePercentage(T number)
+{
+    return OString::number(number) + "%";
+}
+
 #endif
 
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

oox/source/export/drawingml.cxx

@@ -620,17 +620,18 @@ void DrawingML::WriteOutline( Reference< XPropertySet > rXPropSet )
 
     if( bDashSet && aStyleLineStyle != drawing::LineStyle_DASH ) {
         // line style is a dash and it was not set by the shape style
+        // TODO: the XML_d and XML_sp values seem insane
         mpFS->startElementNS( XML_a, XML_custDash, FSEND );
         int i;
         for( i = 0; i < aLineDash.Dots; i ++ )
             mpFS->singleElementNS( XML_a, XML_ds,
-                                   XML_d, aLineDash.DotLen ? I64S( aLineDash.DotLen*1000 ) : "100000",
-                                   XML_sp, I64S( aLineDash.Distance*1000 ),
+                                   XML_d, aLineDash.DotLen ? writePercentage( aLineDash.DotLen*1000 ) : "100000%",
+                                   XML_sp, writePercentage( aLineDash.Distance*1000 ),
                                    FSEND );
         for( i = 0; i < aLineDash.Dashes; i ++ )
             mpFS->singleElementNS( XML_a, XML_ds,
-                                   XML_d, aLineDash.DashLen ? I64S( aLineDash.DashLen*1000 ) : "100000",
-                                   XML_sp, I64S( aLineDash.Distance*1000 ),
+                                   XML_d, aLineDash.DashLen ? writePercentage( aLineDash.DashLen*1000 ) : "100000%",
+                                   XML_sp, writePercentage( aLineDash.Distance*1000 ),
                                    FSEND );
         mpFS->endElementNS( XML_a, XML_custDash );
     }