Fix T62944: Memory leak in animation playback

Missing memory free in the early output of particles distribute
initialization.

Seems it was always there.

source/blender/blenkernel/intern/particle_distribute.c

@@ -1055,6 +1055,14 @@ static int psys_thread_context_init_distribute(ParticleThreadContext *ctx, Parti
 
 	if (totmapped == 0) {
 		/* We are not allowed to distribute particles anywhere... */
+		if (mesh != final_mesh) {
+			BKE_id_free(NULL, mesh);
+		}
+		BLI_kdtree_3d_free(tree);
+		BLI_rng_free(rng);
+		MEM_freeN(element_weight);
+		MEM_freeN(particle_element);
+		MEM_freeN(jitter_offset);
 		return 0;
 	}