gen_lex_hash: Omit deprecated register keywords

This is follow-up to d36c107a

sql/gen_lex_hash.cc

@@ -403,8 +403,8 @@ int main(int argc,char **argv)
 static SYMBOL *get_hash_symbol(const char *s,\n\
                                unsigned int len,bool function)\n\
 {\n\
-  register uchar *hash_map;\n\
-  register const char *cur_str= s;\n\
+  uchar *hash_map;\n\
+  const char *cur_str= s;\n\
 \n\
   if (len == 0) {\n\
     DBUG_PRINT(\"warning\", (\"get_hash_symbol() received a request for a zero-length symbol, which is probably a mistake.\"));\
@@ -416,25 +416,25 @@ static SYMBOL *get_hash_symbol(const char *s,\n\
   if (function){\n\
     if (len>sql_functions_max_len) return 0;\n\
     hash_map= sql_functions_map;\n\
-    register uint32 cur_struct= uint4korr(hash_map+((len-1)*4));\n\
+    uint32 cur_struct= uint4korr(hash_map+((len-1)*4));\n\
 \n\
     for (;;){\n\
-      register uchar first_char= (uchar)cur_struct;\n\
+      uchar first_char= (uchar)cur_struct;\n\
 \n\
       if (first_char == 0)\n\
       {\n\
-        register int16 ires= (int16)(cur_struct>>16);\n\
+        int16 ires= (int16)(cur_struct>>16);\n\
         if (ires==array_elements(symbols)) return 0;\n\
-        register SYMBOL *res;\n\
+        SYMBOL *res;\n\
         if (ires>=0) \n\
           res= symbols+ires;\n\
         else\n\
           res= sql_functions-ires-1;\n\
-		  register uint count= (uint) (cur_str - s);\n\
+		  uint count= (uint) (cur_str - s);\n\
         return lex_casecmp(cur_str,res->name+count,len-count) ? 0 : res;\n\
       }\n\
 \n\
-      register uchar cur_char= (uchar)to_upper_lex[(uchar)*cur_str];\n\
+      uchar cur_char= (uchar)to_upper_lex[(uchar)*cur_str];\n\
       if (cur_char<first_char) return 0;\n\
       cur_struct>>=8;\n\
       if (cur_char>(uchar)cur_struct) return 0;\n\
@@ -450,20 +450,20 @@ static SYMBOL *get_hash_symbol(const char *s,\n\
   }else{\n\
     if (len>symbols_max_len) return 0;\n\
     hash_map= symbols_map;\n\
-    register uint32 cur_struct= uint4korr(hash_map+((len-1)*4));\n\
+    uint32 cur_struct= uint4korr(hash_map+((len-1)*4));\n\
 \n\
     for (;;){\n\
-      register uchar first_char= (uchar)cur_struct;\n\
+      uchar first_char= (uchar)cur_struct;\n\
 \n\
       if (first_char==0){\n\
-        register int16 ires= (int16)(cur_struct>>16);\n\
+        int16 ires= (int16)(cur_struct>>16);\n\
         if (ires==array_elements(symbols)) return 0;\n\
-        register SYMBOL *res= symbols+ires;\n\
-		register uint count= (uint) (cur_str - s);\n\
+        SYMBOL *res= symbols+ires;\n\
+        uint count= (uint) (cur_str - s);\n\
         return lex_casecmp(cur_str,res->name+count,len-count)!=0 ? 0 : res;\n\
       }\n\
 \n\
-      register uchar cur_char= (uchar)to_upper_lex[(uchar)*cur_str];\n\
+      uchar cur_char= (uchar)to_upper_lex[(uchar)*cur_str];\n\
       if (cur_char<first_char) return 0;\n\
       cur_struct>>=8;\n\
       if (cur_char>(uchar)cur_struct) return 0;\n\