Fixed zero return value after panic got rescued.
Fixed zero return value after panic got rescued.

roth1002/gopherjs,ebroder/gopherjs,jeremyschlatter/gopherjs,flimzy/gopherjs,nmfzone/gopherjs,gopherjs/gopherjs,Archs/gopherjs,ebroder/gopherjs,flimzy/gopherjs,bpowers/gopherjs,gopherjs/gopherjs,Yanjing123/gopherjs,albrow/gopherjs,roth1002/gopherjs,Archs/gopherjs,govlas/gopherjs,ebroder/gopherjs,Yanjing123/gopherjs,rasata/gopherjs,govlas/gopherjs,rasata/gopherjs,jeremyschlatter/gopherjs,gopherjs/gopherjs,gopherjs/gopherjs,nmfzone/gopherjs,jargv/gopherjs,jeremyschlatter/gopherjs,albrow/gopherjs,bpowers/gopherjs,gopherjs/gopherjs,rasata/gopherjs,albrow/gopherjs,bpowers/gopherjs,jargv/gopherjs,govlas/gopherjs,flimzy/gopherjs,Archs/gopherjs,roth1002/gopherjs,nmfzone/gopherjs,Yanjing123/gopherjs,jargv/gopherjs