Don't return invalid JSON if node not found

[flightgear.git] / src / Environment / magvarmanager.cxx

diff --git a/src/Environment/magvarmanager.cxx b/src/Environment/magvarmanager.cxx
index 726ba4983d7402cdf05eb155a86da10e897ffa8b..ed02b651f9d055c8b15dd803a6f0f8245b4fa152 100644 (file)
--- a/src/Environment/magvarmanager.cxx
+++ b/src/Environment/magvarmanager.cxx
@@ -26,6 +26,7 @@
 #include <simgear/sg_inlines.h>
 #include <simgear/magvar/magvar.hxx>
 #include <simgear/timing/sg_time.hxx>
+#include <simgear/math/SGMath.hxx>
 
 #include <Main/globals.hxx>
 #include <Main/fg_props.hxx>