Bug fix in low value setting. Originally checked against the wrong channel (chroma) instead of the luminence channel.

Changed default value for high value to 1.0 from 0.0.

source/blender/nodes/intern/CMP_nodes/CMP_lummaMatte.c

@@ -53,7 +53,7 @@ static void do_luma_matte(bNode *node, float *out, float *in)
 	if(in[0]>c->t1) {
 		alpha=1.0;
 	}
-	else if(in[1]<c->t2){
+	else if(in[0]<c->t2){
 		alpha=0.0;
 	}
 	else {/*blend */
@@ -99,7 +99,7 @@ static void node_composit_init_luma_matte(bNode *node)
 {
    NodeChroma *c= MEM_callocN(sizeof(NodeChroma), "node chroma");
    node->storage=c;
-   c->t1= 0.0f;
+   c->t1= 1.0f;
    c->t2= 0.0f;
 };