Prototypes for [v]asprintf

diff --git a/include/stdio.h b/include/stdio.h
index 173503b..d30622c 100644
--- a/include/stdio.h
+++ b/include/stdio.h
@@ -104,6 +104,8 @@
 __extern int vsprintf(char *, const char *, va_list);
 __extern int snprintf(char *, size_t n, const char *, ...);
 __extern int vsnprintf(char *, size_t n, const char *, va_list);
+__extern int asprintf(char **, const char *, ...);
+__extern int vasprintf(char **, const char *, va_list);
 
 /* No buffering, so no flushing needed */
 extern __inline__ int