emix: Rename parameter bool to mute

Summary: Broke my wayland build because something included stdbool.h

Reviewers: devilhorns, zmike

Subscribers: cedric

Differential Revision: https://phab.enlightenment.org/D3467

src/modules/mixer/lib/emix.h

@@ -97,7 +97,7 @@ typedef struct _Emix_Backend {
 
    const Eina_List*      (*ebackend_sources_get)(void);
    void                  (*ebackend_source_mute_set)(Emix_Source *source,
-                                                     Eina_Bool bool);
+                                                     Eina_Bool mute);
    void                  (*ebackend_source_volume_set)(Emix_Source *source,
                                                        Emix_Volume volume);