[PATCH 1/2] Cygwin: Use bool return type for comparison operators in class pinfo

Fixes an error when compiling with gcc 16:

> ../../../../src/winsup/cygwin/signal.cc: In function ‘int kill_pgrp(pid_t, siginfo_t&)’:
> ../../../../src/winsup/cygwin/signal.cc:373:13: error: return type of ‘int pinfo::operator==(_pinfo*) const’ is not ‘bool’
> ../../../../src/winsup/cygwin/signal.cc:373:13: note: used as rewritten candidate for comparison of ‘_pinfo*’ and ‘pinfo’

etc.
---
 winsup/cygwin/local_includes/pinfo.h | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/winsup/cygwin/local_includes/pinfo.h b/winsup/cygwin/local_includes/pinfo.h
index 6f817de6b..fe8203fbc 100644
--- a/winsup/cygwin/local_includes/pinfo.h
+++ b/winsup/cygwin/local_includes/pinfo.h
@@ -227,10 +227,10 @@ public:
   void maybe_set_exit_code_from_windows ();
   void set_exit_code (DWORD n);
   _pinfo *operator -> () const {return procinfo;}
-  int operator == (pinfo *x) const {return x->procinfo == procinfo;}
-  int operator == (pinfo &x) const {return x.procinfo == procinfo;}
-  int operator == (_pinfo *x) const {return x == procinfo;}
-  int operator == (void *x) const {return procinfo == x;}
+  bool operator == (pinfo *x) const {return x->procinfo == procinfo;}
+  bool operator == (pinfo &x) const {return x.procinfo == procinfo;}
+  bool operator == (_pinfo *x) const {return x == procinfo;}
+  bool operator == (void *x) const {return procinfo == x;}
   _pinfo *operator * () const {return procinfo;}
   operator _pinfo * () const {return procinfo;}
   int operator !() const {return !procinfo;}
-- 
2.51.0