Suppress unused-variable warning.

x86 machines lacking HAVE__CPUIDEX saw a complaint about
"unused variable 'reg'", per buildfarm as well as local
experience.  Oversight in bcb2cf41f.

diff --git a/src/port/pg_cpu_x86.c b/src/port/pg_cpu_x86.c
index 3844da511fd3ddabb952de94d4fa6b152736ab25..32d0cecbe2c79592e4ab279875ffbfb4097b2c29 100644 (file)
--- a/src/port/pg_cpu_x86.c
+++ b/src/port/pg_cpu_x86.c
@@ -241,9 +241,8 @@ x86_tsc_frequency_khz(void)
 static uint32
 x86_hypervisor_tsc_frequency_khz(void)
 {
-       unsigned int reg[4] = {0};
-
 #if defined(HAVE__CPUIDEX)
+       unsigned int reg[4] = {0};
 
        /*
         * The hypervisor is determined using the 0x40000000 Hypervisor