navradio: set receiver's signal-quality-norm to 0 when navaid station

[flightgear.git] / src / Instrumentation / heading_indicator_fg.cxx

diff --git a/src/Instrumentation/heading_indicator_fg.cxx b/src/Instrumentation/heading_indicator_fg.cxx
index 960bd98ab55570157b1b706c308a25dba3615f17..ba70da198709502ec52caba3d42b77765f5cde14 100644 (file)
--- a/src/Instrumentation/heading_indicator_fg.cxx
+++ b/src/Instrumentation/heading_indicator_fg.cxx
@@ -14,6 +14,7 @@
 #include <Main/fg_props.hxx>
 #include <Main/util.hxx>                           
 
+using std::string;
 
 HeadingIndicatorFG::HeadingIndicatorFG ( SGPropertyNode *node )
     :