restore special DATE handling code for SbxValue::Compute fdo#44385

restore code that seemed to be erroneously moved as part of the currency enhancement feature
Signed-off-by: Michael Stahl <mstahl@redhat.com>

basic/source/sbx/sbxvalue.cxx

@@ -1264,16 +1264,6 @@ Lbl_OpIsDouble:
                             else aL.nDouble /= aR.nDouble; break;
                         case SbxPLUS:
                             aL.nDouble += aR.nDouble; break;
-#if 0
-                            // See 'break' on preceding line... this
-                            // is unreachable code. Do not delete this
-                            // #if 0 block unless you know for sure
-                            // the 'break' above is intentional.
-
-                            // #45465 Date needs with "+" a special handling: forces date type
-                            if( GetType() == SbxDATE || rOp.GetType() == SbxDATE )
-                                aL.eType = SbxDATE;
-#endif
                         case SbxMINUS:
                             aL.nDouble -= aR.nDouble; break;
                         case SbxNEG:
@@ -1282,6 +1272,11 @@ Lbl_OpIsDouble:
                             SetError( SbxERR_NOTIMP );
                     }
 
+                    // #45465 Date needs with "+" a special handling: forces date type
+
+                    if( eOp == SbxPLUS && (GetType() == SbxDATE || rOp.GetType() == SbxDATE ) )
+                        aL.eType = SbxDATE;
+
                 }
             }