ralloc: remove memset from ralloc_size
ralloc: remove memset from ralloc_size

only do it in rzalloc_size as it was supposed to be

Reviewed-by: Edward O'Callaghan <b035da0d7e151e09fe2005f3a7bc526beb9b3245@folklore1984.net>
Tested-by: Edmondo Tommasina <9e91d6b21d26a489d8e8a656718247cfcec7b511@gmail.com>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler