initializer paren-string {("str")} is a C99ism

First, `"str"` is a string constant but `("str")` is not.  It is a
random expression whose type happen to be const char*.  Second,
non-constant initializer element is forbidden in C90.  Mixture of
these two results in the fact that `{("str")}` is a C99ism.

Just delete the parens and everything goes well.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61553 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

regenc.h

@@ -122,7 +122,7 @@ typedef struct {
 } PosixBracketEntryType;
 
 #define POSIX_BRACKET_ENTRY_INIT(name, ctype) \
-  {(short int )(sizeof(name) - 1), (name), (ctype)}
+  {(short int )(sizeof(name) - 1), name, (ctype)}
 
 #ifndef numberof
 # define numberof(array) (int )(sizeof(array) / sizeof((array)[0]))