patch 8.2.4810: missing changes in one file

Problem:    Missing changes in one file.
Solution:   Also change the struct initializers.

src/regexp.c

@@ -2535,7 +2535,6 @@ static regengine_T bt_regengine =
     bt_regfree,
     bt_regexec_nl,
     bt_regexec_multi,
-    (char_u *)""
 };
 
 #include "regexp_nfa.c"
@@ -2546,7 +2545,6 @@ static regengine_T nfa_regengine =
     nfa_regfree,
     nfa_regexec_nl,
     nfa_regexec_multi,
-    (char_u *)""
 };
 
 // Which regexp engine to use? Needed for vim_regcomp().

src/version.c

@@ -746,6 +746,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    4810,
 /**/
     4809,
 /**/