fix warning (#23)
diff --git a/cpu.go b/cpu.go
index 2bceceb..2082a57 100644
--- a/cpu.go
+++ b/cpu.go
@@ -16,6 +16,7 @@
// #endif
//
// #define HzToGHz(hz) ((hz) / 1000000000.0)
+// #define BUFSIZE 512
//
// UInt64 global_pCoreHz;
// UInt64 global_eCoreHz;
@@ -72,15 +73,14 @@
// io_iterator_t iter;
// IOServiceGetMatchingServices(kIOMainPortDefault, matching, &iter);
//
-// const size_t bufsize = 512;
// io_object_t obj;
// while ((obj = IOIteratorNext(iter))) {
-// char class[bufsize];
+// char class[BUFSIZE];
// IOObjectGetClass(obj, class);
-// char name[bufsize];
+// char name[BUFSIZE];
// IORegistryEntryGetName(obj, name);
//
-// if (strncmp(name, "pmgr", bufsize) == 0) {
+// if (strncmp(name, "pmgr", BUFSIZE) == 0) {
// CFTypeRef pCoreRef = IORegistryEntryCreateCFProperty(obj, CFSTR("voltage-states5-sram"), kCFAllocatorDefault, 0);
// CFTypeRef eCoreRef = IORegistryEntryCreateCFProperty(obj, CFSTR("voltage-states1-sram"), kCFAllocatorDefault, 0);
//
