[PATCH 4/9] btrfs-progs: Fix Wempty-body warning

[Qu Wenruo]

messages.h:49:24: warning: suggest braces around empty body in an 'if' 
statement [-Wempty-body]
    PRINT_TRACE_ON_ERROR;    \

Just extra braces would solve the problem.

Signed-off-by: Qu Wenruo <w...@suse.com>
---
 messages.h | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/messages.h b/messages.h
index ec7d93381a36..16f650d19a4b 100644
--- a/messages.h
+++ b/messages.h
@@ -45,13 +45,16 @@
 
 #define error_on(cond, fmt, ...)                                       \
        do {                                                            \
-               if ((cond))                                             \
+               if ((cond)) {                                           \
                        PRINT_TRACE_ON_ERROR;                           \
-               if ((cond))                                             \
+               }                                                       \
+               if ((cond)) {                                           \
                        PRINT_VERBOSE_ERROR;                            \
+               }                                                       \
                __btrfs_error_on((cond), (fmt), ##__VA_ARGS__);         \
-               if ((cond))                                             \
+               if ((cond)) {                                           \
                        DO_ABORT_ON_ERROR;                              \
+               }                                                       \
        } while (0)
 
 #define error_btrfs_util(err)                                          \
@@ -76,10 +79,12 @@
 
 #define warning_on(cond, fmt, ...)                                     \
        do {                                                            \
-               if ((cond))                                             \
+               if ((cond)) {                                           \
                        PRINT_TRACE_ON_ERROR;                           \
-               if ((cond))                                             \
+               }                                                       \
+               if ((cond)) {                                           \
                        PRINT_VERBOSE_ERROR;                            \
+               }                                                       \
                __btrfs_warning_on((cond), (fmt), ##__VA_ARGS__);       \
        } while (0)
 
-- 
2.19.1