Prevent further execution if we've got empty selects.
Prevent further execution if we've got empty selects.

lshift/diffa,aprescott/diffa,lshift/diffa,aprescott/diffa,aprescott/diffa,lshift/diffa,0x6e6562/diffa,lshift/diffa,lshift/diffa,0x6e6562/diffa,0x6e6562/diffa,aprescott/diffa,0x6e6562/diffa