Fix compilation error in gdb-dlfcn.c (on Windows)

gdb/ChangeLog:

        * gdb-dlfcn.c (gdb_dlopen): Add missing coma in call to
        FormatMessage.

gdb/ChangeLog

@@ -1,3 +1,8 @@
+2011-11-23  Joel Brobecker  <brobecker@adacore.com>
+
+	* gdb-dlfcn.c (gdb_dlopen): Add missing coma in call to
+	FormatMessage.
+
 2011-11-22  Tom Tromey  <tromey@redhat.com>
 
 	PR mi/8444:

gdb/gdb-dlfcn.c

@@ -90,7 +90,7 @@ gdb_dlopen (const char *filename)
     FormatMessage (FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM |
                    FORMAT_MESSAGE_IGNORE_INSERTS,
                    NULL, dw, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
-                   (LPTSTR) &buffer
+                   (LPTSTR) &buffer,
                    0, NULL);
 
     error (_("Could not load %s: %s"), filename, (char *) buffer);