Update a comment.

diff --git a/lib/signal.in.h b/lib/signal.in.h
index 30fa929..f055138 100644 (file)
--- a/lib/signal.in.h
+++ b/lib/signal.in.h
@@ -33,7 +33,8 @@
 
 /* The definition of GL_LINK_WARNING is copied here.  */
 
-/* Mingw defines sigset_t not in <signal.h>, but in <sys/types.h>.  */
+/* Define pid_t, uid_t.
+   Also, mingw defines sigset_t not in <signal.h>, but in <sys/types.h>.  */
 #include <sys/types.h>
 
 #ifdef __cplusplus