Fix: Handle empty pulse/group lists gracefully in Wire

- updateGroups(): Add early return when pulse list is empty
- fetchGroupPtrs(): Skip GXS request when group ID list is empty

This prevents error spam in logs when viewing Wire with no pulses
and avoids the GXS warning about empty group ID lists.

Author: SaurabhCodesAI

src/services/p3wire.cc

@@ -1453,6 +1453,12 @@ bool p3Wire::updatePulseChildren(RsWirePulseSPtr pParent,  uint32_t token)
 
 bool p3Wire::updateGroups(std::list<RsWirePulseSPtr> &pulsePtrs)
 {
+	// Early return if no pulses - nothing to update
+	if (pulsePtrs.empty())
+	{
+		return true;
+	}
+
 	std::set<RsGxsGroupId> pulseGroupIds;
 
 	std::list<RsWirePulseSPtr>::iterator it;
@@ -1651,6 +1657,12 @@ bool p3Wire::fetchGroupPtrs(const std::list<RsGxsGroupId> &groupIds,
 	std::cerr << "p3Wire::fetchGroupPtrs()";
 	std::cerr << std::endl;
 
+	// Handle empty list gracefully - nothing to fetch
+	if (groupIds.empty())
+	{
+		return true;
+	}
+
 	uint32_t token;
 	RsTokReqOptions opts;
 	opts.mReqType = GXS_REQUEST_TYPE_GROUP_DATA;