json output: fix when input is sbs input

json output wasn't emitting anything for positions coming in via SBS
fix that

net_io.c

@@ -5787,6 +5787,9 @@ static void outputMessage(struct modesMessage *mm) {
     if (Modes.filterDF && (mm->sbs_in || !(Modes.filterDFbitset & (1 << mm->msgtype)))) {
         return;
     }
+    if (!Modes.net) {
+        return;
+    }
 
     struct aircraft *ac = mm->aircraft;
 
@@ -5802,15 +5805,11 @@ static void outputMessage(struct modesMessage *mm) {
 
     // Suppress the first message when using an SDR
     // messages with crc 0 have an explicit checksum and are more reliable, don't suppress them when there was no CRC fix performed
-    if (Modes.net && !mm->sbs_in
+    if (!mm->sbs_in
             && (Modes.net_only || Modes.net_verbatim || (mm->crc == 0 && mm->correctedbits == 0) || (ac && ac->messages > 1) || mm->msgtype == DFTYPE_MODEAC)
        ) {
         int is_mlat = (mm->source == SOURCE_MLAT);
 
-        if (mm->jsonPositionOutputEmit && Modes.json_out.connections) {
-            jsonPositionOutput(mm, ac);
-        }
-
         if (Modes.garbage_ports && (mm->garbage || mm->pos_bad) && !mm->pos_old && Modes.garbage_out.connections) {
             modesSendBeastOutput(mm, &Modes.garbage_out);
         }
@@ -5848,7 +5847,11 @@ static void outputMessage(struct modesMessage *mm) {
         }
     }
 
-    if (mm->sbs_in && Modes.net && ac) {
+    if (mm->jsonPositionOutputEmit && Modes.json_out.connections) {
+        jsonPositionOutput(mm, ac);
+    }
+
+    if (mm->sbs_in && ac) {
         if (mm->reduce_forward || !Modes.sbsReduce) {
             if (Modes.sbs_out.connections) {
                 modesSendSBSOutput(mm, ac, &Modes.sbs_out);