Updating code to work with C++03-compatible compilers

1 job for gambit-output in 1 minute and 17 seconds (queued for 2 seconds)
Status Name Job ID Coverage
  Test
failed ubuntu16.04 #356

00:01:17

 
Name Stage Failure
failed
ubuntu16.04 Test There is an unknown failure, please try again
     handle& operator= (handle&& theHandle)
^
CMakeFiles/gmsh.dir/build.make:1958: recipe for target 'CMakeFiles/gmsh.dir/Geo/OCCFace.cpp.o' failed
make[2]: *** [CMakeFiles/gmsh.dir/Geo/OCCFace.cpp.o] Error 1
CMakeFiles/Makefile2:419: recipe for target 'CMakeFiles/gmsh.dir/all' failed
make[1]: *** [CMakeFiles/gmsh.dir/all] Error 2
make: *** [all] Error 2
Makefile:160: recipe for target 'all' failed
ERROR: Job failed: exit code 1