Fix "make check".

Makefile.in

@@ -115,7 +115,7 @@ TRIMSLASH_OBJ = trimslash.o syscall.o lib/compat.o lib/snprintf.o
 trimslash$(EXEEXT): $(TRIMSLASH_OBJ)
 	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $(TRIMSLASH_OBJ) $(LIBS)
 
-T_UNSAFE_OBJ = t_unsafe.o syscall.o util.o t_stub.o lib/compat.o lib/snprintf.o lib/wildmatch.o
+T_UNSAFE_OBJ = t_unsafe.o syscall.o util.o util2.o t_stub.o lib/compat.o lib/snprintf.o lib/wildmatch.o
 t_unsafe$(EXEEXT): $(T_UNSAFE_OBJ)
 	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $(T_UNSAFE_OBJ) $(LIBS)
 

t_stub.c

@@ -25,6 +25,7 @@ int modify_window = 0;
 int preallocate_files = 0;
 int protect_args = 0;
 int module_id = -1;
+int checksum_len = 0;
 int relative_paths = 0;
 int module_dirlen = 0;
 int preserve_acls = 0;