do not parse range fragments as valid ranges

For example, "B2:" or ":B2" were accepted as valid range, with the
missing part set to A1, which resulted in a A1:B2 range.

An omitted sheet specifier always results in a valid relative sheet,
hence that flag is set, so testing flags for non-null before the final
result is available isn't sufficient.

Change-Id: I57d1b7cf71a298e7ac108b0e13aab88208f0f00c

sc/source/core/tool/address.cxx

@@ -1505,7 +1505,7 @@ static sal_uInt16 lcl_ScRange_Parse_OOo( ScRange& rRange,
                     nRes2 |= SCA_COL_ABSOLUTE;
                 }
             }
-            if (nRes1 && nRes2)
+            if ((nRes1 & SCA_VALID) && (nRes2 & SCA_VALID))
             {
                 // PutInOrder / Justify
                 sal_uInt16 nMask, nBits1, nBits2;