FIX: prevent warning C4005: 'min': macro redefinition

Author: Oldes

src/core/f-qsort.c

@@ -58,7 +58,9 @@ typedef int		 cmp_t(const void *, const void *);
 static __inline__ char	*med3(char *, char *, char *, cmp_t *, void *);
 static __inline__ void	 swapfunc(char *, char *, int, int);
 
+#if !defined(min)
 #define min(a, b)	(a) < (b) ? a : b
+#endif
 
 /*
  * Qsort routine from Bentley & McIlroy's "Engineering a Sort Function".