Fixed redefinition warnings on some compilers

src/Makefile

@@ -1,5 +1,5 @@
 CCFLAGS = -std=c99 -O3 -Wno-deprecated-declarations
-LDFLAGS = -lcrypto -I../include
+LDFLAGS = -lcrypto
 
 TARGET = pixiewps
 SOURCE = $(TARGET).c random_r.c

src/random_r.c

@@ -29,6 +29,12 @@
 #include <unistd.h>
 /* #include <errno.h> */
 
+#ifdef __MACH__
+# include "../include/features.h"
+#else
+# include <features.h>
+#endif /* __MACH__ */
+
 #include "random_r.h"
 
 /* An improved random number generation package.  In addition to the standard