evas_map: Fix a bug about wrong map point colors

Summary: evas_map_point_color_get returns wrong rgbs values always because of error label.

Test Plan: Execute test suite

Reviewers: raster, Hermet, cedric, jpeg, stefan_schmidt, Jaehyun_Cho

Reviewed By: Jaehyun_Cho

Differential Revision: https://phab.enlightenment.org/D5983

src/lib/evas/canvas/evas_map.c

@@ -848,6 +848,7 @@ evas_map_point_color_get(const Evas_Map *m, int idx, int *r, int *g, int *b, int
    if (g) *g = p->g;
    if (b) *b = p->b;
    if (a) *a = p->a;
+   return;
 
 error:
    if (r) *r = 255;