Fix Enumerable#tally with some arguments pattern [Feature #17744]

* Add test cases for Enumerable#tally with hash argument

* Add ruby/spec for Enumerable#tally with hash argument

* Fix Enumerable#tally does not update given frozen hash

* Add test cases for Enumerable#tally with hash convertible arguments

* Fix SEGV when Enumerable#tally takes non Hash convertible

* FIx cosmetic damage enum.c

core/enumerable/tally_spec.rb

@@ -45,6 +45,25 @@
       enum.tally({ 'foo' => 1 }).should == { 'foo' => 3, 'bar' => 1, 'baz' => 1}
     end
 
+    it "returns the given hash" do
+      enum = EnumerableSpecs::Numerous.new('foo', 'bar', 'foo', 'baz')
+      hash = { 'foo' => 1 }
+      enum.tally(hash).should equal(hash)
+    end
+
+    it "raises a FrozenError and does not udpate the given hash when the hash is frozen" do
+      enum = EnumerableSpecs::Numerous.new('foo', 'bar', 'foo', 'baz')
+      hash = { 'foo' => 1 }.freeze
+      -> { enum.tally(hash) }.should raise_error(FrozenError)
+      hash.should == { 'foo' => 1 }
+    end
+
+    it "does not call given block" do
+      enum = EnumerableSpecs::Numerous.new('foo', 'bar', 'foo', 'baz')
+      enum.tally({ 'foo' => 1 }) { |v| ScratchPad << v }
+      ScratchPad.recorded.should == []
+    end
+
     it "ignores the default value" do
       enum = EnumerableSpecs::Numerous.new('foo', 'bar', 'foo', 'baz')
       enum.tally(Hash.new(100)).should == { 'foo' => 2, 'bar' => 1, 'baz' => 1}