Remove `round` definition. Fixes #44.

Maybe also Fixes #60? The function isn't called anywhere and modern msvc
do define it already, so the definition leads to an error.

pydensecrf/densecrf/src/permutohedral.cpp

@@ -27,11 +27,11 @@
 
 #include "permutohedral.h"
 
-#ifdef WIN32
-inline int round(double X) {
-	return int(X+.5);
-}
-#endif
+//#ifdef WIN32
+//inline int round(double X) {
+//	return int(X+.5);
+//}
+//#endif
 
 #ifdef __SSE__
 // SSE Permutoheral lattice