[PATCH] Fix unused malloc return value warning

[François Dumont]

Hi

 Â Â Â  I am having this warning:

/home/fdt/dev/gcc/git/libstdc++-v3/testsuite/util/testsuite_performance.h:170: 
attention: ignoring return value of « void* malloc(size_t) » declared 
with attribute « warn_unused_result » [-Wunused-result]
 Â  170 |Â Â Â Â Â Â  malloc(0); // Needed for some implementations.

 Â Â Â  Ok to fix it with attached patch ?

 Â Â Â  It seems trivial but I wonder if I shouldn't keep the malloc 
returned pointer and free it properly ?

 Â Â Â  Or maybe just remove the malloc cause there is not clear comment 
explaining why it's needed and I haven't found much in SVN audit trail.

 Â Â Â  * testsuite_files/util/testsuite_performance.h
 Â Â Â  (resource_counter::start): Ignore unused malloc(0) result.

François

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