fix: Cast time_t to a known type for snprintf()

minitar.h

@@ -12,7 +12,7 @@
 #include <stdio.h>
 #include <time.h>
 
-#ifdef _MSC_VER
+#ifdef _WIN32
 typedef unsigned int mode_t;
 typedef unsigned int gid_t;
 typedef unsigned int uid_t;

src/util.c

@@ -20,7 +20,7 @@
 #define noreturn _Noreturn
 #endif
 
-#if !defined(_MSC_VER) && !defined(__TINYC__)
+#if !defined(_WIN32) && !defined(__TINYC__)
 #define WEAK __attribute__((weak))
 #else
 #define WEAK
@@ -250,7 +250,7 @@ void minitar_construct_header_from_metadata(struct tar_header* hdr, const struct
     // snprintf will write the null terminator past the size field. We don't care, as we will overwrite that zero later.
     snprintf(hdr->size, 13, "%.12zo", metadata->size);
     // Same here.
-    snprintf(hdr->mtime, 13, "%.12lo", metadata->mtime);
+    snprintf(hdr->mtime, 13, "%.12llo", (long long)metadata->mtime);
 
     switch (metadata->type)
     {