use rb_check_hash_type

* class.c (rb_scan_args): use rb_check_hash_type.
* process.c (rb_exec_getargs): ditto.
* sprintf.c (get_hash): ditto.
* string.c (rb_str_sub_bang, str_gsub): ditto.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36220 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

class.c

@@ -1463,7 +1463,7 @@ rb_scan_args(int argc, const VALUE *argv, const char *fmt, ...)
 		argc--;
 	}
 	else {
-	    hash = rb_check_convert_type(last, T_HASH, "Hash", "to_hash");
+	    hash = rb_check_hash_type(last);
 	    if (!NIL_P(hash))
 		argc--;
 	}

process.c

@@ -1843,7 +1843,7 @@ rb_exec_getargs(int *argc_p, VALUE **argv_p, int accept_shell, VALUE *env_ret, V
     VALUE hash, prog;
 
     if (0 < *argc_p) {
-        hash = rb_check_convert_type((*argv_p)[*argc_p-1], T_HASH, "Hash", "to_hash");
+        hash = rb_check_hash_type((*argv_p)[*argc_p-1]);
         if (!NIL_P(hash)) {
             *opthash_ret = hash;
             (*argc_p)--;
@@ -1851,7 +1851,7 @@ rb_exec_getargs(int *argc_p, VALUE **argv_p, int accept_shell, VALUE *env_ret, V
     }
 
     if (0 < *argc_p) {
-        hash = rb_check_convert_type((*argv_p)[0], T_HASH, "Hash", "to_hash");
+        hash = rb_check_hash_type((*argv_p)[0]);
         if (!NIL_P(hash)) {
             *env_ret = hash;
             (*argc_p)--;

sprintf.c

@@ -161,7 +161,7 @@ get_hash(volatile VALUE *hash, int argc, const VALUE *argv)
     if (argc != 2) {
 	rb_raise(rb_eArgError, "one hash required");
     }
-    tmp = rb_check_convert_type(argv[1], T_HASH, "Hash", "to_hash");
+    tmp = rb_check_hash_type(argv[1]);
     if (NIL_P(tmp)) {
 	rb_raise(rb_eArgError, "one hash required");
     }

string.c

@@ -3616,7 +3616,7 @@ rb_str_sub_bang(int argc, VALUE *argv, VALUE str)
     }
     else {
 	repl = argv[1];
-	hash = rb_check_convert_type(argv[1], T_HASH, "Hash", "to_hash");
+	hash = rb_check_hash_type(argv[1]);
 	if (NIL_P(hash)) {
 	    StringValue(repl);
 	}
@@ -3768,7 +3768,7 @@ str_gsub(int argc, VALUE *argv, VALUE str, int bang)
 	break;
       case 2:
 	repl = argv[1];
-	hash = rb_check_convert_type(argv[1], T_HASH, "Hash", "to_hash");
+	hash = rb_check_hash_type(argv[1]);
 	if (NIL_P(hash)) {
 	    StringValue(repl);
 	}