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src/fvec.c: fvec_copy: only get min if needed

--- a/src/fvec.c

+++ b/src/fvec.c

@@ -87,13 +87,13 @@

 void fvec_copy(fvec_t *s, fvec_t *t) {

   uint_t j;

-  uint_t length = MIN(s->length, t->length);

+  uint_t length = t->length;

   if (s->length != t->length) {

-    AUBIO_WRN("trying to copy %d elements to %d elements \n", 

-            s->length, t->length);

+    AUBIO_WRN("trying to copy %d elements to %d elements \n",

+        s->length, t->length);

+    length = MIN(s->length, t->length);

   }

   for (j=0; j< length; j++) {

     t->data[j] = s->data[j];

   }

 }

-