shithub: c9

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make aux pointer has its own user-defined type

--- a/c9.h

+++ b/c9.h

@@ -1,3 +1,5 @@

+struct C9aux;

+

 typedef struct C9r C9r;

 typedef struct C9t C9t;

 typedef struct C9stat C9stat;

@@ -291,7 +293,7 @@

 	void (*error)(const char *fmt, ...) __attribute__((nonnull(1)));

 	/* Auxiliary data, can be used by any of above callbacks. */

-	void *aux;

+	struct C9aux *aux;

 	/* private stuff */

 	uint32_t msize;