silence -Wparentheses-equality

Clang has taken it upon itself to warn when an equality is wrapped in
double parentheses, e.g.

    ((foo == bar))

Which is a bit dumb, as any code along the lines of

    #define isBAR (foo == BAR)
    if (isBAR) {}

will trigger the warning.

This commit shuts clang up by putting in a harmless cast:

    #define isBAR cBOOL(foo == BAR)

1 files changed, 1 insertions, 1 deletions

diff --git a/regcomp.h b/regcomp.h
index c2e44aab46..a8842a1bc7 100644
--- a/regcomp.h
+++ b/regcomp.h
@@ -368,7 +368,7 @@ struct regnode_ssc {
 
 #define REG_MAGIC 0234
 
-#define SIZE_ONLY (RExC_emit == (regnode *) & RExC_emit_dummy)
+#define SIZE_ONLY cBOOL(RExC_emit == (regnode *) & RExC_emit_dummy)
 #define PASS1 SIZE_ONLY
 #define PASS2 (! SIZE_ONLY)