regcomp.c: Add comment

diff --git a/regcomp.c b/regcomp.c
index 1c2c4df..b98f72f 100644 (file)
--- a/regcomp.c
+++ b/regcomp.c
@@ -9552,6 +9552,8 @@ parseit:
            }
        }
 
+       /* non-Latin1 code point implies unicode semantics.  Must be set in
+        * pass1 so is there for the whole of pass 2 */
        if (value > 255) {
            RExC_uni_semantics = 1;
        }