AVOption: remove an unused function parameter.

libavutil/opt.c

@@ -349,7 +349,7 @@ int av_opt_get(void *obj, const char *name, int search_flags, uint8_t **out_val)
     return 0;
 }
 
-static int get_number(void *obj, const char *name, const AVOption **o_out, double *num, int *den, int64_t *intnum,
+static int get_number(void *obj, const char *name, double *num, int *den, int64_t *intnum,
                       int search_flags)
 {
     void *dst, *target_obj;
@@ -359,8 +359,6 @@ static int get_number(void *obj, const char *name, const AVOption **o_out, doubl
 
     dst = ((uint8_t*)target_obj) + o->offset;
 
-    if (o_out) *o_out= o;
-
     return read_number(o, dst, num, den, intnum);
 
 error:
@@ -374,7 +372,7 @@ int av_opt_get_int(void *obj, const char *name, int search_flags, int64_t *out_v
     double     num = 1;
     int   ret, den = 1;
 
-    if ((ret = get_number(obj, name, NULL, &num, &den, &intnum, search_flags)) < 0)
+    if ((ret = get_number(obj, name, &num, &den, &intnum, search_flags)) < 0)
         return ret;
     *out_val = num*intnum/den;
     return 0;
@@ -386,7 +384,7 @@ int av_opt_get_double(void *obj, const char *name, int search_flags, double *out
     double     num = 1;
     int   ret, den = 1;
 
-    if ((ret = get_number(obj, name, NULL, &num, &den, &intnum, search_flags)) < 0)
+    if ((ret = get_number(obj, name, &num, &den, &intnum, search_flags)) < 0)
         return ret;
     *out_val = num*intnum/den;
     return 0;
@@ -398,7 +396,7 @@ int av_opt_get_q(void *obj, const char *name, int search_flags, AVRational *out_
     double     num = 1;
     int   ret, den = 1;
 
-    if ((ret = get_number(obj, name, NULL, &num, &den, &intnum, search_flags)) < 0)
+    if ((ret = get_number(obj, name, &num, &den, &intnum, search_flags)) < 0)
         return ret;
 
     if (num == 1.0 && (int)intnum == intnum)