swresample/resample: move resample_free() higher in the file

Also make it more readable while at it.
Signed-off-by: James Almer <jamrial@gmail.com>
(cherry picked from commit 2a8a8a2e)

Conflicts:
	libswresample/resample.c

libswresample/resample.c

@@ -171,6 +171,14 @@ static int build_filter(ResampleContext *c, void *filter, double factor, int tap
     return 0;
 }
 
+static void resample_free(ResampleContext **cc){
+    ResampleContext *c = *cc;
+    if(!c)
+        return;
+    av_freep(&c->filter_bank);
+    av_freep(cc);
+}
+
 static ResampleContext *resample_init(ResampleContext *c, int out_rate, int in_rate, int filter_size, int phase_shift, int linear,
                                     double cutoff0, enum AVSampleFormat format, enum SwrFilterType filter_type, int kaiser_beta,
                                     double precision, int cheby)
@@ -251,13 +259,6 @@ error:
     return NULL;
 }
 
-static void resample_free(ResampleContext **c){
-    if(!*c)
-        return;
-    av_freep(&(*c)->filter_bank);
-    av_freep(c);
-}
-
 static int set_compensation(ResampleContext *c, int sample_delta, int compensation_distance){
     c->compensation_distance= compensation_distance;
     if (compensation_distance)