avcodec/aac/aacdec_float: Call ff_aac_float_common_init() only once

That's enough.

Reviewed-by: Lynne <dev@lynne.ee>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

libavcodec/aac/aacdec_float.c

@@ -64,6 +64,8 @@ static void init_tables_float_fn(void)
     AAC_RENAME(ff_init_ff_sine_windows)(9);
 
     AAC_RENAME(ff_aac_sbr_init)();
+
+    ff_aac_float_common_init();
 }
 
 static int init(AACDecContext *ac)
@@ -75,8 +77,6 @@ static int init(AACDecContext *ac)
     if (!ac->fdsp)
         return AVERROR(ENOMEM);
 
-    ff_aac_float_common_init();
-
     return 0;
 }