From: Richard Henderson <richard.henderson@linaro.org>

Use ## to drop the preceding comma if __VA_ARGS__ is empty.

Reviewed-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
(cherry picked from commit b7cd0a1821adf9906c5edb248394bb2a95482656)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

diff --git a/target/sparc/translate.c b/target/sparc/translate.c
index b922e53bf1..336583beab 100644
--- a/target/sparc/translate.c
+++ b/target/sparc/translate.c
@@ -2487,7 +2487,7 @@ static int extract_qfpreg(DisasContext *dc, int x)
 
 #define TRANS(NAME, AVAIL, FUNC, ...) \
     static bool trans_##NAME(DisasContext *dc, arg_##NAME *a) \
-    { return avail_##AVAIL(dc) && FUNC(dc, __VA_ARGS__); }
+    { return avail_##AVAIL(dc) && FUNC(dc, ## __VA_ARGS__); }
 
 #define avail_ALL(C)      true
 #ifdef TARGET_SPARC64
-- 
2.47.3