Add HAVE_FCHMOD to the list of ifdefs when checking whether or not to use fchmod. duh.

config/mkdepend/main.c

@@ -637,7 +637,7 @@ redirect(line, makefile)
 	    }
 	}
 	fflush(fdout);
-#if defined(USGISH) || defined(_SEQUENT_) || defined(USE_CHMOD)
+#if defined(USGISH) || defined(_SEQUENT_) || defined(USE_CHMOD) || !defined(HAVE_FCHMOD)
 	chmod(makefile, st.st_mode);
 #else
         fchmod(fileno(fdout), st.st_mode);