a singleton must be fully parsed to be valid, tdf#44419 related

No trailing characters must be present in 1:1 or A:A full row/column
references, e.g. 2:2,2 is not valid. The original cause is the lexical
analyzer that accepted 2,2 as the second part after the range operator
because ',' is also the group separator here, which needs further
changes.

Change-Id: Iff354469f7dcb4e0b6fa645c39cc1f8ebad4a6ea

sc/source/core/tool/address.cxx

@@ -922,7 +922,7 @@ static sal_uInt16 lcl_ScRange_Parse_XL_A1( ScRange& r,
 
         tmp1 = lcl_eatWhiteSpace( tmp1 );
         tmp2 = lcl_a1_get_row( tmp1, &r.aEnd, &nFlags2 );
-        if( !tmp2 )
+        if( !tmp2 || *tmp2 != 0 )   // Must have fully parsed a singleton.
             return 0;
 
         r.aStart.SetCol( 0 ); r.aEnd.SetCol( MAXCOL );
@@ -945,7 +945,7 @@ static sal_uInt16 lcl_ScRange_Parse_XL_A1( ScRange& r,
 
         tmp1 = lcl_eatWhiteSpace( tmp1 );
         tmp2 = lcl_a1_get_col( tmp1, &r.aEnd, &nFlags2 );
-        if( !tmp2 )
+        if( !tmp2 || *tmp2 != 0 )   // Must have fully parsed a singleton.
             return 0;
 
         r.aStart.SetRow( 0 ); r.aEnd.SetRow( MAXROW );