one more C++ test error

[Bruno Haible]

On mingw, without the 'sigpipe' module, I'm seeing this error:

  g++-3 -mno-cygwin -DHAVE_CONFIG_H -I.  -I. -I. -I.. -I./.. -I../gllib 
-I./../gllib -I/usr/local/mingw/include -Wall   -MT test-unistd-c++.o -MD -MP 
-MF .deps/test-unistd-c++.Tpo -c -o test-unistd-c++.o test-unistd-c++.cc
  In file included from test-unistd-c++.cc:22:
  ../gllib/unistd.h:1556: error: invalid conversion from `int (*)(int, const 
void*, unsigned int)' to `ssize_t (*)(int, const void*, size_t)'
  make[4]: *** [test-unistd-c++.o] Error 1

This fixes it.


2010-04-10  Bruno Haible  <address@hidden>

        write: Fix a C++ test error on mingw.
        * lib/unistd.in.h (write): Use _GL_CXXALIAS_SYS_CAST.

--- lib/unistd.in.h.orig        Sat Apr 10 21:08:06 2010
+++ lib/unistd.in.h     Sat Apr 10 21:07:51 2010
@@ -1268,7 +1268,10 @@
                                   _GL_ARG_NONNULL ((2)));
 _GL_CXXALIAS_RPL (write, ssize_t, (int fd, const void *buf, size_t count));
 # else
-_GL_CXXALIAS_SYS (write, ssize_t, (int fd, const void *buf, size_t count));
+/* Need to cast, because on mingw, the third parameter is
+                                                             unsigned int count
+   and the return type is 'int'.  */
+_GL_CXXALIAS_SYS_CAST (write, ssize_t, (int fd, const void *buf, size_t 
count));
 # endif
 _GL_CXXALIASWARN (write);
 #endif