avfilter/af_anequalizer: Don't allocate outpad names

These names are always the same, so not using duplicates saves
allocations, checks for the allocations as well as frees.

Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>

libavfilter/af_anequalizer.c

@@ -192,33 +192,23 @@ static av_cold int init(AVFilterContext *ctx)
     int ret;
 
     pad = (AVFilterPad){
-        .name         = av_strdup("out0"),
+        .name         = "out0",
         .type         = AVMEDIA_TYPE_AUDIO,
     };
 
-    if (!pad.name)
-        return AVERROR(ENOMEM);
-
     ret = ff_insert_outpad(ctx, 0, &pad);
-    if (ret < 0) {
-        av_freep(&pad.name);
+    if (ret < 0)
         return ret;
-    }
 
     if (s->draw_curves) {
         vpad = (AVFilterPad){
-            .name         = av_strdup("out1"),
+            .name         = "out1",
             .type         = AVMEDIA_TYPE_VIDEO,
             .config_props = config_video,
         };
-        if (!vpad.name) {
-            return AVERROR(ENOMEM);
-        }
         ret = ff_insert_outpad(ctx, 1, &vpad);
-        if (ret < 0) {
-            av_freep(&vpad.name);
+        if (ret < 0)
             return ret;
-        }
     }
 
     return 0;
@@ -267,8 +257,6 @@ static av_cold void uninit(AVFilterContext *ctx)
 {
     AudioNEqualizerContext *s = ctx->priv;
 
-    for (int i = 0; i < ctx->nb_outputs; i++)
-        av_freep(&ctx->output_pads[i].name);
     av_frame_free(&s->video);
     av_freep(&s->filters);
     s->nb_filters = 0;