patch 7.4.1061
Problem:    Compiler warning for ignoring return value of fwrite().
Solution:   Do use the return value. (idea: Charles Campbell)
diff --git a/src/misc2.c b/src/misc2.c
index 65ac886..0aad428 100644
--- a/src/misc2.c
+++ b/src/misc2.c
@@ -6300,8 +6300,9 @@
 
 /*
  * Write time_t to file "fd" in 8 bytes.
+ * Returns FAIL when the write failed.
  */
-    void
+    int
 put_time(fd, the_time)
     FILE	*fd;
     time_t	the_time;
@@ -6309,7 +6310,7 @@
     char_u	buf[8];
 
     time_to_bytes(the_time, buf);
-    (void)fwrite(buf, (size_t)8, (size_t)1, fd);
+    return fwrite(buf, (size_t)8, (size_t)1, fd) == 1 ? OK : FAIL;
 }
 
 /*