The ornamental design for a shower doorwallframeextension member, as shown and described.
FIG. 1 is a top, front perspective view of a shower door wall frame
extension member showing my new design, the extension member being of
indeterminate length;
FIG. 2 is a bottom, rear perspective view thereof; and
FIG. 3 is an end elevational view thereof.
The shower door wall frame extension member is a continuous piece cut to
the desired length. The front and rear perspective views comprising FIGS.
1 and 2 and the end view of FIG. 3 are accordingly believed to completely
disclose the design.