Fix static analysis warnings in Lua bindings.
Fix static analysis warnings in Lua bindings.

The Lua error APIs are not annotated, so the clang static analyzer
doesn't know that they unwind the stack without returning. Just add
some fake returns to keep squash the analyzer warnings.

clearswift/trafficserver,chenglongwei/trafficserver,reveller/trafficserver,pbchou/trafficserver,persiaAziz/trafficserver,reveller/trafficserver,taoyunxing/trafficserver,chenglongwei/trafficserver,chenglongwei/trafficserver,rahmalik/trafficserver,vmamidi/trafficserver,pbchou/trafficserver,chenglongwei/trafficserver,davidbz/trafficserver,taoyunxing/trafficserver,rahmalik/trafficserver,dyrock/trafficserver,PSUdaemon/trafficserver,duke8253/trafficserver,rahmalik/trafficserver,persiaAziz/trafficserver,chenglongwei/trafficserver,duke8253/trafficserver,dyrock/trafficserver,dyrock/trafficserver,clearswift/trafficserver,SolidWallOfCode/trafficserver,rahmalik/trafficserver,chitianhao/trafficserver,rahmalik/trafficserver,persiaAziz/trafficserver,vmamidi/trafficserver,rpufky/trafficserver,clearswift/trafficserver,vmamidi/trafficserver,clearswift/trafficserver,rpufky/trafficserver,SolidWallOfCode/trafficserver,taoyunxing/trafficserver,pbchou/trafficserver,davidbz/trafficserver,chenglongwei/trafficserver,taoyunxing/trafficserver,bryancall/trafficserver,rahmalik/trafficserver,dyrock/trafficserver,chitianhao/trafficserver,rahmalik/trafficserver,PSUdaemon/trafficserver,taoyunxing/trafficserver,PSUdaemon/trafficserver,reveller/trafficserver,bryancall/trafficserver,vmamidi/trafficserver,bryancall/trafficserver,duke8253/trafficserver,bryancall/trafficserver,clearswift/trafficserver,rpufky/trafficserver,taoyunxing/trafficserver,dyrock/trafficserver,duke8253/trafficserver,PSUdaemon/trafficserver,chenglongwei/trafficserver,reveller/trafficserver,dyrock/trafficserver,chitianhao/trafficserver,bryancall/trafficserver,taoyunxing/trafficserver,SolidWallOfCode/trafficserver,reveller/trafficserver,persiaAziz/trafficserver,PSUdaemon/trafficserver,reveller/trafficserver,chitianhao/trafficserver,clearswift/trafficserver,rpufky/trafficserver,taoyunxing/trafficserver,reveller/trafficserver,duke8253/trafficserver,SolidWallOfCode/trafficserver,rpufky/trafficserver,vmamidi/trafficserver,rpufky/trafficserver,duke8253/trafficserver,davidbz/trafficserver,persiaAziz/trafficserver,persiaAziz/trafficserver,SolidWallOfCode/trafficserver,persiaAziz/trafficserver,PSUdaemon/trafficserver,rpufky/trafficserver,SolidWallOfCode/trafficserver,duke8253/trafficserver,clearswift/trafficserver,vmamidi/trafficserver,rahmalik/trafficserver,chenglongwei/trafficserver,chitianhao/trafficserver,chitianhao/trafficserver,pbchou/trafficserver,PSUdaemon/trafficserver,reveller/trafficserver,clearswift/trafficserver,reveller/trafficserver,pbchou/trafficserver,rahmalik/trafficserver,dyrock/trafficserver,PSUdaemon/trafficserver,chitianhao/trafficserver,davidbz/trafficserver,taoyunxing/trafficserver,SolidWallOfCode/trafficserver,clearswift/trafficserver,bryancall/trafficserver,PSUdaemon/trafficserver,persiaAziz/trafficserver,davidbz/trafficserver,rpufky/trafficserver,davidbz/trafficserver,rpufky/trafficserver,pbchou/trafficserver