added a fallback in get_seconds_hires to get_seconds

Former-commit-id: 7e96c8954eb1e05c4a227808c372191a1db8a510

get_seconds_hires.h

@@ -12,7 +12,7 @@ namespace igl
 #  include <windows.h>
 inline double igl::get_seconds_hires()
 {
-	LARGE_INTEGER li_freq, li_current;
+	LARGE_INTEGER li_freq, li_current;
 	const bool ret = QueryPerformanceFrequency(&li_freq);
 	const bool ret2 = QueryPerformanceCounter(&li_current);
 	assert(ret && ret2);
@@ -20,12 +20,11 @@ inline double igl::get_seconds_hires()
 	return double(li_current.QuadPart) / double(li_freq.QuadPart);
 }
 #else
-#  include <sys/time.h>
+#  include "get_seconds.h"
 inline double igl::get_seconds_hires()
 {
 	// Sorry I've no idea how performance counters work on Mac...
-	assert(false);
-	return 0.0;
+	return igl::get_seconds();
 }
 #endif
 #endif