Removed unused variable.

source/blender/blenkernel/BKE_particle.h

@@ -145,7 +145,7 @@ typedef struct ParticleThreadContext {
 	float maxweight;
 	int *index, *skip, jitlevel;
 
-	int from, cfrom, distr;
+	int cfrom, distr;
 
 	struct ParticleData *tpars;
 

source/blender/blenkernel/intern/particle_distribute.c

@@ -1080,7 +1080,6 @@ static int psys_thread_context_init_distribute(ParticleThreadContext *ctx, Parti
 	ctx->jitoff= jitter_offset;
 	ctx->weight= element_weight;
 	ctx->maxweight= maxweight;
-	ctx->from= (children) ? PART_FROM_CHILD : from;
 	ctx->cfrom= cfrom;
 	ctx->distr= distr;
 	ctx->dm= dm;