Fix tests run with make check when using alternative allocators.

The call to free in line 584 of sharedbook.c mismatches
the _ogg_calloc call used to allocated that data in line 216.

This causes make check to fail when alternative allocators
are used, e.g. the xmm_malloc family of allocators used with
the Lancer optimizations.
Signed-off-by: Ralph Giles <giles@thaumas.net>

lib/sharedbook.c

@@ -581,7 +581,7 @@ void run_test(static_codebook *b,float *comp){
       exit(1);
     }
   }
-  free(out);
+  _ogg_free(out);
 }
 
 int main(){