Made it redefine on each include

include/assert.h

@@ -8,17 +8,25 @@
  * The FENIX C Library is distributed WITH NO WARRANTY WHATSOEVER. See
  * The CWPL for more details.
  */
-
-#ifndef _ASSERT_H
-#define _ASSERT_H
-
 #include <stdlib.h>
 #include <stdio.h>
 
+/* 
+  So, this one's a bit weird. Normally, we'd use include guards to make sure
+  a header is only included once, but the assert macro is supposed to be
+  redefined each time assert.h is included based on the current status of 
+  NDEBUG, so we instead undefine-redefine assert and that's it. Technically, 
+  it includes stdlib.h and stdio.h every time it's included, but meh. It's fine.
+  Those have include guards that mean it doesn't matter.
+  -Kat
+*/
+
+#ifdef assert
+#undef assert
+#endif
+
 #ifdef NDEBUG
 #define assert(ignore) ((void) 0)
 #else
 #define assert(expression) (expression || (fprintf(stderr, "Assertion failed: %s: %d: %s", __FILE__, __LINE__, __func__) && abort()))
-#endif
+#endif
-
-#endif