Description of problem:

A guest can start up by command "qemu-kvm -smp a,cores=0 -hda /tmp/test.qcow2" , but as we know values of "smp","cores","sockets","threads" and "maxcpus" should be an integer greater than zero;
although, qemu-kvm has instead the invaild values to "1" and startup the guest, and in fact the value of "-smp" option is a invaid value;

And I found "-m" not speicaled , system will use a default value , but if a invaild setted, qemu will exit with error message;
[root@localhost ~]# qemu-kvm -m a
qemu: invalid ram size: a

I hope "-smp" option do same action like "-m" do;

Version-Release number of selected component (if applicable):


How reproducible:


Steps to Reproduce:
1. create a image with : qemu-img create -f qcow2  /tmp/test.qcow2 1G
2. boot up guest with a invaild value "a" set to -smp option
  
Actual results:

guest boot up without any warning or error messgae about invaid value detected

Expected results:

qemu exit and with error message print out

Additional info: