refs #314, renamed convertFromQVariant, convertFromJson

discussion: https://dev.vatsim-germany.org/issues/314#note-19

src/blackmisc/avaircraftsituation.cpp

@@ -148,7 +148,7 @@ namespace BlackMisc
         {
             if (index.isMyself())
             {
-                this->fromQVariant(variant);
+                this->convertFromQVariant(variant);
                 return;
             }