qemu: fix wrong evaluation in qemuDomainSetMemoryParameters

19c6ad9a (qemu: Refactor qemuDomainSetMemoryParameters) introduced
a new macro, VIR_GET_LIMIT_PARAMETER(PARAM, VALUE). But if statement
in the macro is not correct and so set_XXXX flags are set to false
in the wrong. As a result, libvirt ignores all memtune parameters.
This patch fixes the conditional expression to work correctly.
Signed-off-by: NSatoru Moriya <satoru.moriya@hds.com>

src/qemu/qemu_driver.c

@@ -7280,7 +7280,7 @@ qemuDomainSetMemoryParameters(virDomainPtr dom,
     }
 
 #define VIR_GET_LIMIT_PARAMETER(PARAM, VALUE)                                \
-    if ((rc = virTypedParamsGetULLong(params, nparams, PARAM, &VALUE) < 0))  \
+    if ((rc = virTypedParamsGetULLong(params, nparams, PARAM, &VALUE)) < 0)  \
         goto cleanup;                                                        \
                                                                              \
     if (rc == 1)                                                             \