The ornamental design for an accessory of controller for computer, as shown and described.
FIG. 1 is a front side perspective view of an accessory of controller for computer showing our new design;
FIG. 2 is a back side perspective view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a top view thereof;
FIG. 5 is a right view thereof;
FIG. 6 is a left view thereof;
FIG. 7 is a back view thereof;
FIG. 8 is a bottom view thereof; and,
FIG. 9 is a reference view putting on computer controller thereof.
The evenly dashed lines depict portions of the accessory of controller for computer and form no part of the claimed design. The evenly dashed lines in FIG. 9 depict environmental structure that forms no part of the claimed design. The dot-dash lines in FIGS. 1, 4 and 5 depict boundary lines and form no part of the claimed design.