Simlified use of StopWatch and included example into amaze demosaic

rtengine/StopWatch.h

@@ -24,6 +24,12 @@
 #include <iostream>
 #include "mytime.h"
 
+#ifdef BENCHMARK
+    #define BENCHFUN StopWatch StopFun(__func__);
+#else
+    #define BENCHFUN
+#endif
+
 class StopWatch
 {
 public:

rtengine/amaze_demosaic_RT.cc

@@ -31,12 +31,14 @@
 #include "procparams.h"
 #include "sleef.c"
 #include "opthelper.h"
+#include "StopWatch.h"
 
 namespace rtengine
 {
 
 SSEFUNCTION void RawImageSource::amaze_demosaic_RT(int winx, int winy, int winw, int winh)
 {
+    BENCHFUN
 #define HCLIP(x) x //is this still necessary???
     //min(clip_pt,x)