Fix a small bug with external calls that take user context getting one too many argument types if they are not in the runtime_api module. Add an assertion to ensure they always are in the runtime_api module as a way to help anyone adding runtime APIs.
Fix a small bug with external calls that take user context getting one
too many argument types if they are not in the runtime_api module. Add
an assertion to ensure they always are in the runtime_api module as a way
to help anyone adding runtime APIs.

delcypher/Halide,adasworks/Halide,tdenniston/Halide,dougkwan/Halide,delcypher/Halide,jiawen/Halide,kgnk/Halide,smxlong/Halide,ronen/Halide,dougkwan/Halide,myrtleTree33/Halide,tdenniston/Halide,smxlong/Halide,tdenniston/Halide,ronen/Halide,delcypher/Halide,ronen/Halide,delcypher/Halide,psuriana/Halide,smxlong/Halide,smxlong/Halide,smxlong/Halide,myrtleTree33/Halide,tdenniston/Halide,dougkwan/Halide,kgnk/Halide,jiawen/Halide,myrtleTree33/Halide,tdenniston/Halide,jiawen/Halide,delcypher/Halide,psuriana/Halide,kgnk/Halide,kgnk/Halide,myrtleTree33/Halide,jiawen/Halide,dougkwan/Halide,tdenniston/Halide,psuriana/Halide,myrtleTree33/Halide,psuriana/Halide,kgnk/Halide,smxlong/Halide,dougkwan/Halide,psuriana/Halide,jiawen/Halide,smxlong/Halide,kgnk/Halide,delcypher/Halide,jiawen/Halide,dougkwan/Halide,dougkwan/Halide,tdenniston/Halide,psuriana/Halide,dougkwan/Halide,myrtleTree33/Halide,adasworks/Halide,delcypher/Halide,adasworks/Halide,adasworks/Halide,ronen/Halide,psuriana/Halide,jiawen/Halide,ronen/Halide,ronen/Halide,smxlong/Halide,kgnk/Halide,adasworks/Halide,myrtleTree33/Halide,tdenniston/Halide,ronen/Halide,ronen/Halide,myrtleTree33/Halide,adasworks/Halide,delcypher/Halide,adasworks/Halide,adasworks/Halide,kgnk/Halide