crypto: Remove compiler warning on an fprintf in the otp test engine
crypto: Remove compiler warning on an fprintf in the otp test engine

The otp_test_engine is only used in some of the test cases.

dgud/otp,potatosalad/otp,potatosalad/otp,legoscia/otp,vinoski/otp,dgud/otp,aboroska/otp,uabboli/otp,lrascao/otp,RoadRunnr/otp,rlipscombe/otp,lrascao/otp,ferd/otp,legoscia/otp,electricimp/otp,g-andrade/otp,rlipscombe/otp,mikpe/otp,emacsmirror/erlang,vinoski/otp,vinoski/otp,bsmr-erlang/otp,aboroska/otp,bsmr-erlang/otp,bjorng/otp,emacsmirror/erlang,emacsmirror/erlang,RoadRunnr/otp,g-andrade/otp,uabboli/otp,potatosalad/otp,bsmr-erlang/otp,getong/otp,rlipscombe/otp,mikpe/otp,bjorng/otp,bsmr-erlang/otp,isvilen/otp,legoscia/otp,isvilen/otp,vladdu/otp,bsmr-erlang/otp,jj1bdx/otp,ferd/otp,vladdu/otp,erlang/otp,erlang/otp,mikpe/otp,g-andrade/otp,RoadRunnr/otp,dumbbell/otp,g-andrade/otp,uabboli/otp,electricimp/otp,lrascao/otp,potatosalad/otp,dgud/otp,potatosalad/otp,kvakvs/otp,erlang/otp,ferd/otp,dumbbell/otp,kvakvs/otp,vladdu/otp,aboroska/otp,vinoski/otp,aboroska/otp,kvakvs/otp,aboroska/otp,jj1bdx/otp,bjorng/otp,dumbbell/otp,vinoski/otp,emacsmirror/erlang,potatosalad/otp,dgud/otp,g-andrade/otp,RoadRunnr/otp,isvilen/otp,jj1bdx/otp,uabboli/otp,legoscia/otp,lrascao/otp,getong/otp,vladdu/otp,ferd/otp,rlipscombe/otp,lrascao/otp,kvakvs/otp,g-andrade/otp,uabboli/otp,isvilen/otp,bjorng/otp,electricimp/otp,emacsmirror/erlang,isvilen/otp,dumbbell/otp,uabboli/otp,dumbbell/otp,dgud/otp,g-andrade/otp,mikpe/otp,vladdu/otp,rlipscombe/otp,ferd/otp,bsmr-erlang/otp,getong/otp,kvakvs/otp,legoscia/otp,legoscia/otp,rlipscombe/otp,lrascao/otp,vladdu/otp,mikpe/otp,dgud/otp,electricimp/otp,mikpe/otp,emacsmirror/erlang,g-andrade/otp,mikpe/otp,jj1bdx/otp,bjorng/otp,jj1bdx/otp,rlipscombe/otp,dgud/otp,getong/otp,lrascao/otp,kvakvs/otp,emacsmirror/erlang,electricimp/otp,vinoski/otp,vladdu/otp,uabboli/otp,potatosalad/otp,legoscia/otp,bjorng/otp,RoadRunnr/otp,kvakvs/otp,ferd/otp,ferd/otp,aboroska/otp,jj1bdx/otp,potatosalad/otp,electricimp/otp,uabboli/otp,bjorng/otp,uabboli/otp,getong/otp,aboroska/otp,isvilen/otp,electricimp/otp,dumbbell/otp,RoadRunnr/otp,isvilen/otp,erlang/otp,getong/otp,dgud/otp,dumbbell/otp,lrascao/otp,electricimp/otp,jj1bdx/otp,vinoski/otp,kvakvs/otp,jj1bdx/otp,aboroska/otp,mikpe/otp,rlipscombe/otp,RoadRunnr/otp,dumbbell/otp,potatosalad/otp,lrascao/otp,electricimp/otp,isvilen/otp,vladdu/otp,rlipscombe/otp,erlang/otp,isvilen/otp,legoscia/otp,vinoski/otp,bsmr-erlang/otp,ferd/otp,vinoski/otp,jj1bdx/otp,dumbbell/otp,RoadRunnr/otp,erlang/otp,getong/otp,erlang/otp,emacsmirror/erlang,erlang/otp,g-andrade/otp,RoadRunnr/otp,aboroska/otp,getong/otp,mikpe/otp,erlang/otp,emacsmirror/erlang,rlipscombe/otp,bjorng/otp,getong/otp,jj1bdx/otp,mikpe/otp,bjorng/otp,isvilen/otp,kvakvs/otp,g-andrade/otp,bsmr-erlang/otp,legoscia/otp,dgud/otp,bjorng/otp,vladdu/otp,vinoski/otp,ferd/otp,emacsmirror/erlang,dgud/otp,dumbbell/otp,bsmr-erlang/otp,erlang/otp,getong/otp,potatosalad/otp