tdf#93296 dashes in decimal part => 0 min decimal places

During import, as well during export, "0.--" must be considered
as 0 min decimal places

Change-Id: I33d06dd95c0678660bc0bb222972f82ef54f2c6e
Reviewed-on: https://gerrit.libreoffice.org/19647Reviewed-by: Eike Rathke <erack@redhat.com>
Tested-by: Eike Rathke <erack@redhat.com>
(cherry picked from commit 3f970cf2)
Reviewed-on: https://gerrit.libreoffice.org/19781
(cherry picked from commit 18be99af)

xmloff/source/style/xmlnumfe.cxx

@@ -1206,7 +1206,10 @@ void SvXMLNumFmtExport::ExportPart_Impl( const SvNumberformat& rFormat, sal_uInt
                     if ( bExpFound && pElemStr )
                         nExpDigits += pElemStr->getLength();
                     else if ( !bDecDashes && pElemStr && (*pElemStr)[0] == '-' )
+                    {
                         bDecDashes = true;
+                        nMinDecimals = 0;
+                    }
                     else if ( !bInInteger && pElemStr )
                     {
                         for ( sal_Int32 i = pElemStr->getLength()-1; i >= 0 && (*pElemStr)[i] == '#'; i-- )

xmloff/source/style/xmlnumfi.cxx

@@ -1021,7 +1021,7 @@ SvXMLNumFmtElementContext::SvXMLNumFmtElementContext( SvXMLImport& rImport,
     }
     if ( aNumInfo.nMinDecimalDigits == -1)
     {
-        if ( bVarDecimals )
+        if ( bVarDecimals || aNumInfo.bDecReplace )
             aNumInfo.nMinDecimalDigits = 0;
         else
             aNumInfo.nMinDecimalDigits = aNumInfo.nDecimals;