the last condition is "all other numbers", not the third, tdf#92457 related

(cherry picked from commit b3c11e2b)

So we'll properly strip the "value()<=1.79769313486232E+308"
condition that 5.1 will write.

This will not enable the handling of the style, but at least it is fed
correctly as intended to the number formatter.

Change-Id: Ic9571d938c4a8837c5712bafbfb2ebf9f32011df
Reviewed-on: https://gerrit.libreoffice.org/16988Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

xmloff/source/style/xmlnumfi.cxx

@@ -2129,10 +2129,10 @@ void SvXMLNumFormatContext::AddCondition( const sal_Int32 nIndex )
         if ( aConditions.isEmpty() && aMyConditions.size() == 1 && sRealCond == ">=0" )
             bDefaultCond = true;
 
-        if ( nType == XML_TOK_STYLES_TEXT_STYLE && nIndex == 2 )
+        if ( nType == XML_TOK_STYLES_TEXT_STYLE && static_cast<size_t>(nIndex) == aMyConditions.size() - 1 )
         {
-            //  The third condition in a number format with a text part can only be
-            //  "all other numbers", the condition string must be empty.
+            //  The last condition in a number format with a text part can only
+            //  be "all other numbers", the condition string must be empty.
             bDefaultCond = true;
         }