builtin: fix print mem leak on windows

vlib/builtin/builtin.v

@@ -91,6 +91,9 @@ pub fn print(s string) {
 			wide_str := s.to_wide()
 			wide_len := C.wcslen(wide_str)
 			C.WriteConsole(output_handle, wide_str, wide_len, &bytes_written, 0)
+			unsafe {
+				free(wide_str)
+			}
 		} else {
 			C.WriteFile(output_handle, s.str, s.len, &bytes_written, 0)
 		}
@@ -99,6 +102,27 @@ pub fn print(s string) {
 	}
 }
 
+const (
+	new_line_character = '\n'
+)
+pub fn println(s string) {
+	$if windows {
+		print(s)
+		print(new_line_character)
+	} $else {
+		//  TODO: a syscall sys_write on linux works, except for the v repl.
+		//  Probably it is a stdio buffering issue. Needs more testing...
+		//	$if linux {
+		//		$if !android {
+		//			snl := s + '\n'
+		//			C.syscall(/* sys_write */ 1, /* stdout_value */ 1, snl.str, s.len+1)
+		//			return
+		//		}
+		//	}
+		C.printf('%.*s\n', s.len, s.str)
+	}
+}
+
 __global total_m i64=0
 __global nr_mallocs int=0
 

vlib/builtin/builtin_nix.c.v

@@ -24,19 +24,6 @@ fn builtin_init() {
 	// Do nothing
 }
 
-pub fn println(s string) {
-	//  TODO: a syscall sys_write on linux works, except for the v repl.
-	//  Probably it is a stdio buffering issue. Needs more testing...
-	//	$if linux {
-	//		$if !android {
-	//			snl := s + '\n'
-	//			C.syscall(/* sys_write */ 1, /* stdout_value */ 1, snl.str, s.len+1)
-	//			return
-	//		}
-	//	}
-	C.printf('%.*s\n', s.len, s.str)
-}
-
 fn print_backtrace_skipping_top_frames(xskipframes int) bool {
 	skipframes := xskipframes + 2
 	$if macos {

vlib/builtin/builtin_windows.c.v

@@ -139,7 +139,3 @@ fn print_backtrace_skipping_top_frames_mingw(skipframes int) bool {
 	eprintln('print_backtrace_skipping_top_frames_mingw is not implemented')
 	return false
 }
-
-pub fn println(s string) {
-	print('$s\n')
-}