The ornamental design for a lock for furniture, as shown and described.
FIG. 1 is a plan view of a lock for furniture embodying my new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a cross sectional view taken on line 6-6 of FIG. 2;
FIG. 7 is a cross sectional view taken on line 7-7 of FIG. 3;
FIG. 8 is a perspective view;
FIG. 9 is a perspective view of FIG. 8 shown on a fragmented glass door. The broken line showing is included for the purpose of illustrating and forms no part of the claimed design; and,
FIG. 10 is a perspective view of FIG. 8 shown on a fragmented glass door. The broken line showing is included for the purpose of illustrating and forms no part of the claimed design.