vlib: remove malloc unsafe warning

vlib/compiler/msvc.v

@@ -33,6 +33,7 @@ const (
 // Given a root key look for one of the subkeys in 'versions' and get the path
 fn find_windows_kit_internal(key RegKey, versions []string) ?string {
 	$if windows {
+		unsafe {
 			for version in versions {
 				required_bytes := 0 // TODO mut
 				result := C.RegQueryValueEx(key, version.to_wide(), 0, 0, 0, &required_bytes)
@@ -57,6 +58,7 @@ fn find_windows_kit_internal(key RegKey, versions []string) ?string {
 				return string_from_wide(value)
 			}
 		}
+	}
 	return error('windows kit not found')
 }
 

vlib/os/os.v

@@ -681,6 +681,7 @@ pub fn get_line() string {
 // get_raw_line returns a one-line string from stdin along with '\n' if there is any
 pub fn get_raw_line() string {
 	$if windows {
+		unsafe {
 			max_line_chars := 256
 			buf := malloc(max_line_chars * 2)
 			h_input := C.GetStdHandle(STD_INPUT_HANDLE)
@@ -703,6 +704,7 @@ pub fn get_raw_line() string {
 				offset++
 			}
 			return string(buf, offset)
+		}
 	} $else {
 		max := size_t(0)
 		mut buf := byteptr(0)

vlib/os/os_windows.v

@@ -207,6 +207,7 @@ pub fn get_file_handle(path string) HANDLE {
 // get_module_filename retrieves the fully qualified path for the file that contains the specified module.
 // The module must have been loaded by the current process.
 pub fn get_module_filename(handle HANDLE) ?string {
+	unsafe {
 		mut sz := 4096 // Optimized length
 		mut buf := &u16(malloc(4096))
 		for {
@@ -222,6 +223,7 @@ pub fn get_module_filename(handle HANDLE) ?string {
 				}
 			}
 		}
+	}
     panic('this should be unreachable') // TODO remove unreachable after loop
 }