Exempt MissileSystem mines from being hidden on LongRange radar (#2826)

Author: oznogon

src/systems/missilesystem.cpp

@@ -362,6 +362,8 @@ void MissileSystem::spawnProjectile(sp::ecs::Entity source, MissileTubes::MountP
         trace.radius = 32.0f;
         trace.max_size = trace.min_size = 32 * (0.25f + 0.25f * category_modifier);
         trace.flags = RadarTrace::Rotate;
+        // Exempt mines from LongRange restriction.
+        if (tube.type_loaded == MW_Mine) trace.flags |= RadarTrace::LongRange;
         trace.color = mwd.color;
 
         auto& sfx = missile.addComponent<Sfx>();