Signal: fix a clang warning. (remove a static in hxx)
Signal: fix a clang warning. (remove a static in hxx)

Change-Id: I4cfb5a148ac13abeed9f13b7952e2b0a22217aa4

bsautron/libqi,aldebaran/libqi,aldebaran/libqi,aldebaran/libqi,vbarbaresi/libqi