Fix a crash with GPS dialog.

If an invalid filter type is supplied, don't run the queries.
This showed up with GPS dialog, since the PUI combo box defaults to
no entry selected, not the first entry.

diff --git a/src/Scripting/NasalPositioned_cppbind.cxx b/src/Scripting/NasalPositioned_cppbind.cxx
index d0fe0b942024b37101cb5a9eabd8301ea2e5b342..eb9a14158b88e3e79890d775187bbb0c25ea560e 100644 (file)
--- a/src/Scripting/NasalPositioned_cppbind.cxx
+++ b/src/Scripting/NasalPositioned_cppbind.cxx
@@ -395,9 +395,13 @@ static naRef f_findWithinRange(nasal::CallContext ctx)
 {
   SGGeod pos = getPosition(ctx);
   double range_nm = ctx.requireArg<double>(0);
-
-  FGPositioned::TypeFilter filter(FGPositioned::typeFromName(ctx.getArg<std::string>(1)));
+  
+    FGPositioned::Type ty = FGPositioned::typeFromName(ctx.getArg<std::string>(1));
+    if (ty == FGPositioned::INVALID)
+        naRuntimeError(ctx.c, "invalid filter type specification");
     
+  FGPositioned::TypeFilter filter(ty);
+  
   FGPositionedList items = FGPositioned::findWithinRange(pos, range_nm, &filter);
   FGPositioned::sortByRange(items, pos);
   return ctx.to_nasal(items);