[partition] Explain underlying type for flags variant

src/modules/partition/core/PartitionInfo.cpp

@@ -56,7 +56,11 @@ flags( const Partition* partition )
     {
         return partition->activeFlags();
     }
-    if ( v.type() == QVariant::Int )
+    // The underlying type of PartitionTable::Flags can be int or uint
+    // (see qflags.h) and so setting those flags can create a QVariant
+    // of those types; we don't just want to check QVariant::canConvert()
+    // here because that will also accept QByteArray and some other things.
+    if ( v.type() == QVariant::Int || v.type() == QVariant::UInt )
     {
         return static_cast< PartitionTable::Flags >( v.toInt() );
     }