The ornamental design for a surveillancecamera, as shown and described.
FIG. 1 is a front view of a surveillance camera showing my new design;
FIG. 2 is a rear view thereof;
FIG. 3 is a left side view thereof;
FIG. 4 is a right side view thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a bottom plan view thereof; and,
FIG. 7 is a front perspective view thereof.
The broken lines in the views show portions of the surveillance camera that form no part of the claimed design.
The boundary lines shown in dot-dash form designate bounds of the claimed design. It is understood that the claimed design extends to the boundary but does not include the boundary.