Twiddle header order to compile on OS X again

svn:r2681

src/common/compat.h

@@ -21,6 +21,9 @@
 #ifdef HAVE_SYS_TYPES_H
 #include <sys/types.h>
 #endif
+#ifdef HAVE_SYS_TIME_H
+#include <sys/time.h>
+#endif
 #include <stdarg.h>
 
 #ifndef NULL_REP_IS_ZERO_BYTES