Use new embed.fnc implementation for extended_utf8_to_uv

This shows how two synonymous macros can be conveniently defined in a
single place

Author: khwilliamson

embed.fnc

@@ -1177,11 +1177,12 @@ AOdp	|SV *	|eval_pv	|NN const char *p			\
 				|I32 croak_on_error
 AOdp	|SSize_t|eval_sv	|NN SV *sv				\
 				|I32 flags
-ATdmp	|bool	|extended_utf8_to_uv					\
+ATdp	|bool	|extended_utf8_to_uv					\
 				|NN const U8 * const s			\
 				|NN const U8 * const e			\
 				|NN UV *cp_p				\
-				|NULLOK Size_t *advance_p
+				|NULLOK Size_t *advance_p		\
+	      = utf8_to_uv(s,e,cp_p,advance_p)
 Adfpv	|void	|fatal_warner	|U32 err				\
 				|NN const char *pat			\
 				|...

embed.h

@@ -225,7 +225,8 @@
 # define dump_vindent(a,b,c,d)                  Perl_dump_vindent(aTHX_ a,b,c,d)
 # define eval_pv(a,b)                           Perl_eval_pv(aTHX_ a,b)
 # define eval_sv(a,b)                           Perl_eval_sv(aTHX_ a,b)
-# define extended_utf8_to_uv                    Perl_extended_utf8_to_uv
+# define extended_utf8_to_uv(s,e,cp_p,advance_p) utf8_to_uv(s,e,cp_p,advance_p)
+# define Perl_extended_utf8_to_uv               extended_utf8_to_uv
 # define fbm_compile(a,b)                       Perl_fbm_compile(aTHX_ a,b)
 # define fbm_instr(a,b,c,d)                     Perl_fbm_instr(aTHX_ a,b,c,d)
 # define filter_add(a,b)                        Perl_filter_add(aTHX_ a,b)

proto.h

@@ -165,8 +165,6 @@ typedef enum {
         Perl_utf8_to_uv_errors(  s, e, cp_p, advance_p, flags, 0)
 #define Perl_utf8_to_uv_errors(  s, e, cp_p, advance_p, flags, errors)      \
           Perl_utf8_to_uv_msgs(  s, e, cp_p, advance_p, flags, errors, 0)
-#define Perl_extended_utf8_to_uv(s, e, cp_p, advance_p)                     \
-                 Perl_utf8_to_uv(s, e, cp_p, advance_p)
 #define Perl_strict_utf8_to_uv(  s, e, cp_p, advance_p)                     \
         Perl_utf8_to_uv_flags(   s, e, cp_p, advance_p,                     \
                                         UTF8_DISALLOW_ILLEGAL_INTERCHANGE)