um: Remove some unnecessary NULL checks in vector_user.c

kfree() already checks for null pointers, so additional checking is
unnecessary.
Signed-off-by: Alex Dewar <alex.dewar@gmx.co.uk>
Signed-off-by: Richard Weinberger <richard@nod.at>

arch/um/drivers/vector_user.c

@@ -221,7 +221,6 @@ static struct vector_fds *user_init_tap_fds(struct arglist *ifspec)
 	return result;
 tap_cleanup:
 	printk(UM_KERN_ERR "user_init_tap: init failed, error %d", fd);
-	if (result != NULL)
 	kfree(result);
 	return NULL;
 }
@@ -266,7 +265,6 @@ static struct vector_fds *user_init_hybrid_fds(struct arglist *ifspec)
 	return result;
 hybrid_cleanup:
 	printk(UM_KERN_ERR "user_init_hybrid: init failed");
-	if (result != NULL)
 	kfree(result);
 	return NULL;
 }
@@ -344,9 +342,7 @@ static struct vector_fds *user_init_unix_fds(struct arglist *ifspec, int id)
 unix_cleanup:
 	if (fd >= 0)
 		os_close_file(fd);
-	if (remote_addr != NULL)
 	kfree(remote_addr);
-	if (result != NULL)
 	kfree(result);
 	return NULL;
 }
@@ -382,7 +378,6 @@ static struct vector_fds *user_init_raw_fds(struct arglist *ifspec)
 	return result;
 raw_cleanup:
 	printk(UM_KERN_ERR "user_init_raw: init failed, error %d", err);
-	if (result != NULL)
 	kfree(result);
 	return NULL;
 }