include stdint.h explicitly for UINT16_MAX)

Fixes

| tc_core.c:190:29: error: 'UINT16_MAX' undeclared (first use in this function); did you mean '__INT16_MAX__'?
|    if ((sz >> s->size_log) > UINT16_MAX) {
|                              ^~~~~~~~~~

---
 tc/tc_core.c | 1 +
 1 file changed, 1 insertion(+)

index 7bbe0d7..821b741 100644
@@ -12,6 +12,7 @@
 
 #include <stdio.h>
 #include <stdlib.h>
+#include <stdint.h>
 #include <unistd.h>
 #include <syslog.h>
 #include <fcntl.h>

2.13.0

Applied.