Evas GL: string_query returns a const char *

Why cast to/from void* in the first place?

src/lib/evas/canvas/evas_gl.c

@@ -517,7 +517,7 @@ evas_gl_string_query(Evas_GL *evas_gl, int name)
    return "";
    MAGIC_CHECK_END();
 
-   return (const char *)evas_gl->evas->engine.func->gl_string_query(evas_gl->evas->engine.data.output, name);
+   return evas_gl->evas->engine.func->gl_string_query(evas_gl->evas->engine.data.output, name);
 }
 
 EAPI Evas_GL_Func

src/lib/evas/include/evas_private.h

@@ -1250,7 +1250,7 @@ struct _Evas_Func
    void *(*gl_context_create)            (void *data, void *share_context, int version);
    int  (*gl_context_destroy)            (void *data, void *context);
    int  (*gl_make_current)               (void *data, void *surface, void *context);
-   void *(*gl_string_query)              (void *data, int name);
+   const char *(*gl_string_query)        (void *data, int name);
    void *(*gl_proc_address_get)          (void *data, const char *name);
    int  (*gl_native_surface_get)         (void *data, void *surface, void *native_surface);
    void *(*gl_api_get)                   (void *data, int version);

src/modules/evas/engines/gl_generic/evas_engine.c

@@ -1199,11 +1199,11 @@ eng_gl_rotation_angle_get(void *data)
    return evgl_engine->funcs->rotation_angle_get(data);
 }
 
-static void *
+static const char *
 eng_gl_string_query(void *data, int name)
 {
    EVGLINIT(data, NULL);
-   return (void *)evgl_string_query(name);
+   return evgl_string_query(name);
 }
 
 // Need to deprecate this function..

src/modules/evas/engines/software_generic/evas_engine.c

@@ -2559,7 +2559,7 @@ eng_gl_make_current(void *data EINA_UNUSED, void *surface, void *context)
 }
 
 // FIXME!!! Implement later
-static void *
+static const char *
 eng_gl_string_query(void *data EINA_UNUSED, int name EINA_UNUSED)
 {
    return NULL;