CpuUsage: add support for Windows

src/detection/cpuUsage/cpuUsage.h

@@ -3,6 +3,9 @@
 #ifndef FF_INCLUDED_detection_cpu_cpuUsage
 #define FF_INCLUDED_detection_cpu_cpuUsage
 
-const char* ffGetCpuUsageInfo(long* inUseAll, long* totalAll);
+#include <stdint.h>
+
+// We need to use uint64_t because sizeof(long) == 4 on Windows
+const char* ffGetCpuUsageInfo(uint64_t* inUseAll, uint64_t* totalAll);
 
 #endif