apidb: Fix one-off error in current way/relation loading

The previous patch had a minor bug where the minimum way and relation
ids being loaded into the current tables were one-off and therefore
missing the first id to be loaded.

osmosis-apidb/src/main/java/org/openstreetmap/osmosis/apidb/v0_6/ApidbWriter.java

@@ -1160,7 +1160,7 @@ public void process(WayContainer wayContainer) {
             maxWayId = wayId + 1;
         }
         if (wayId < minWayId) {
-          minWayId = wayId + 1;
+          minWayId = wayId;
         }
         wayBuffer.add(way);
 
@@ -1215,7 +1215,7 @@ public void process(RelationContainer relationContainer) {
             maxRelationId = relationId + 1;
         }
         if (relationId < minRelationId) {
-          minRelationId = relationId + 1;
+          minRelationId = relationId;
         }
         relationBuffer.add(relation);