dialog: pass stream in STREAM-ACCEPT ACCEPTING-VALUES-STREAM method
dialog: pass stream in STREAM-ACCEPT ACCEPTING-VALUES-STREAM method

In context such as FORMATTING-CELL that may re-bind the stream
variable, explicitly pass the value of that variable to functions that
operate on the stream. Also fixes the corresponding warnings about
unused variables.

slyrus/mcclim,slyrus/mcclim