Fix compilation warnings in the Windows build.

 src/editfns.c [HAVE_PWD_H]: Include grp.h.
 src/makefile.w32-in ($(BLD)/editfns.$(O)): Add $(NT_INC)/grp.h.

src/ChangeLog

+2012-12-14  Eli Zaretskii  <eliz@gnu.org>
+
+	* editfns.c [HAVE_PWD_H]: Include grp.h.
+
+	* makefile.w32-in ($(BLD)/editfns.$(O)): Add $(NT_INC)/grp.h.
+
 2012-12-14  Paul Eggert  <eggert@cs.ucla.edu>
 
 	Fix permissions bugs with setgid directories etc. (Bug#13125)

src/editfns.c

@@ -24,6 +24,7 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #ifdef HAVE_PWD_H
 #include <pwd.h>
+#include <grp.h>
 #endif
 
 #include <unistd.h>

src/makefile.w32-in

@@ -781,6 +781,7 @@ $(BLD)/editfns.$(O) : \
 	$(SRC)/editfns.c \
 	$(SRC)/blockinput.h \
 	$(NT_INC)/pwd.h \
+	$(NT_INC)/grp.h \
 	$(NT_INC)/unistd.h \
 	$(GNU_LIB)/intprops.h \
 	$(GNU_LIB)/strftime.h \