Fix building objcopy under mingw64 by replacing uses of strndup with xstrndup.

* objcopy.c (parse_symflags): Use xstrndup in place of strndup.
	(copy_main): Likewise.

binutils/ChangeLog

@@ -1,3 +1,8 @@
+2015-11-20  Ronald Hoogenboom  <hoogenboom30@zonnet.nl>
+
+	* objcopy.c (parse_symflags): Use xstrndup in place of strndup.
+	(copy_main): Likewise.
+
 2015-11-20  Nick Clifton  <nickc@redhat.com>
 
 	* po/ca.po: New Catalan translation.

binutils/objcopy.c

@@ -771,7 +771,7 @@ parse_symflags (const char *s, char **other)
 
 #define PARSE_OTHER(fname,fval)								   \
       else if (len >= (int) sizeof fname && strncasecmp (fname, s, sizeof fname - 1) == 0) \
-	fval = strndup (s + sizeof fname - 1, len - sizeof fname + 1)
+	fval = xstrndup (s + sizeof fname - 1, len - sizeof fname + 1)
       
       if (0) ;
       PARSE_FLAG ("local", BSF_LOCAL);
@@ -4082,10 +4082,10 @@ copy_main (int argc, char *argv[])
 	      fatal (_("bad format for %s"), "--add-symbol");
 	    t = strchr (s + 1, ':');
 
-	    newsym->symdef = strndup (optarg, s - optarg);
+	    newsym->symdef = xstrndup (optarg, s - optarg);
 	    if (t)
 	      {
-		newsym->section = strndup (s + 1, t - (s + 1));
+		newsym->section = xstrndup (s + 1, t - (s + 1));
 		newsym->symval = strtol (t + 1, NULL, 0);
 	      }
 	    else