Strict standards and ns usage

Strict Standards: Declaration of
SMWSql3StubSemanticData::getPropertyValues() should be compatible with that
of SMW\SemanticData::getPropertyValues() in
/var/www/html/w/extensions/SemanticMediaWiki/includes/storage/SQLStore/SMW_Sql3StubSemanticData.php
on line 262

Strict Standards: Declaration of
SMWSql3StubSemanticData::removePropertyObjectValue() should be compatible
with that of SMW\SemanticData::removePropertyObjectValue() in
/var/www/html/w/extensions/SemanticMediaWiki/includes/storage/SQLStore/SMW_Sql3StubSemanticData.php
on line 262

## Reason for the notice 
The difference in the namespace usage (as seen below):

SMWSql3StubSemanticData::removePropertyObjectValue( SMWDIProperty $property, SMWDataItem $dataItem ) {

SMW\SemanticData::removePropertyObjectValue( DIProperty $property, SMWDataItem $dataItem ) {