Promote twin_fixed_abs as public API

Author: jserv

apps/line.c

@@ -50,8 +50,6 @@ static twin_dispatch_result_t _apps_line_update_pos(apps_line_t *line,
     return TwinDispatchDone;
 }
 
-#define twin_fixed_abs(f) ((f) < 0 ? -(f) : (f))
-
 static int _apps_line_hit(apps_line_t *line, twin_fixed_t x, twin_fixed_t y)
 {
     int i;

apps/spline.c

@@ -132,8 +132,6 @@ static twin_dispatch_result_t _apps_spline_update_pos(apps_spline_t *spline,
     return TwinDispatchDone;
 }
 
-#define twin_fixed_abs(f) ((f) < 0 ? -(f) : (f))
-
 static int _apps_spline_hit(apps_spline_t *spline,
                             twin_fixed_t x,
                             twin_fixed_t y)

include/twin.h

@@ -660,6 +660,7 @@ void twin_event_enqueue(const twin_event_t *event);
 
 #define twin_fixed_mul(a, b) ((twin_fixed_t) (((int64_t) (a) * (b)) >> 16))
 #define twin_fixed_div(a, b) ((twin_fixed_t) ((((int64_t) (a)) << 16) / (b)))
+#define twin_fixed_abs(f) ((f) < 0 ? -(f) : (f))
 
 twin_fixed_t twin_fixed_sqrt(twin_fixed_t a);
 

src/path.c

@@ -184,8 +184,6 @@ void twin_path_ellipse(twin_path_t *path,
     twin_path_close(path);
 }
 
-#define twin_fixed_abs(f) ((f) < 0 ? -(f) : (f))
-
 static twin_fixed_t _twin_matrix_max_radius(twin_matrix_t *m)
 {
     return (twin_fixed_abs(m->m[0][0]) + twin_fixed_abs(m->m[0][1]) +