Fix GCC4.6 warning unused variables in GnuRegex replacement

diff --git a/compat/GnuRegex.c b/compat/GnuRegex.c
index c51ad7249c1f90e3b457437e10f392f0d6f367df..33e3616b8dd5ad902d16d1f1ed61e79b27a358af 100644 (file)
--- a/compat/GnuRegex.c
+++ b/compat/GnuRegex.c
@@ -3730,6 +3730,9 @@ on_failure:
             POP_FAILURE_POINT(sdummy, pdummy,
                               dummy_low_reg, dummy_high_reg,
                               reg_dummy, reg_dummy, reg_info_dummy);
+            /* avoid GCC 4.6 set but unused variables warning. Does not matter here. */
+            if (pdummy || sdummy)
+                (void)0;
         }
         /* Note fall through.  */