Problem with CFG_TUSB_DEBUG_PRINTF macros

[mudrovc]

In my system, I'm using a custom implementation of printf() to exclude famous malloc() issues.
So I'm using the CFG_TUSB_DEBUG_PRINTF macros to redirect the printing function. But there is a call of snprintf() in function tu_lookup_find(), which is not redirected with macros. Also #include <stdio.h> is masked from the #ifdef CFG_TUSB_DEBUG_PRINTF definition. So the source cannot be compiled in this case.

I think a redirecting macros for snprintf() should also be included as possibility. Or it should be changed with some code which not calls stdio libraries...

[hathach]

I agree snprintf() should be removed.