preface.h in rgeo-3.0.0.pre.rc.2

- old
+ new

@@ -48,5 +48,9 @@
 #define RGEO_END_C
 #endif
 
 // https://ozlabs.org/~rusty/index.cgi/tech/2008-04-01.html
 #define streq(a, b) (!strcmp((a),(b)))
+
+// When using ruby ALLOC* macros, we are using ruby_xmalloc, which counterpart
+// is ruby_xfree. This macro helps enforcing that by showing us the way.
+#define FREE ruby_xfree