`mut v :=` update examples

examples/word_counter/word_counter.v

@@ -5,7 +5,7 @@
 import os
 
 fn main() {
-	mut path = 'cinderella.txt'
+	mut path := 'cinderella.txt'
 	if os.args.len != 2 {
 		println('usage: word_counter [text_file]')
 		println('using $path')

gl/1shader.v

@@ -105,8 +105,8 @@ pub fn new_shader(name string) Shader {
 	fragment_path := '${dir}${name}.frag'
 	println('shader path=$vertex_path,\n fpath="$fragment_path"')
 	// vertex_src := os.read_file(vertex_path.trim_space())
-	mut vertex_src = ''
-	mut fragment_src = ''
+	mut vertex_src := ''
+	mut fragment_src := ''
 	if name == 'text' {
 		vertex_src = TEXT_VERT
 		fragment_src = TEXT_FRAG

http/http_mac.v

@@ -46,7 +46,7 @@ fn C.curl_easy_strerror(curl voidptr) byteptr
 fn C.curl_easy_perform(curl voidptr) C.CURLcode
 
 fn write_fn(contents byteptr, size, nmemb int, _mem *MemoryStruct) int {
-	mut mem = _mem
+	mut mem := _mem
 	// # printf("size =%d nmemb=%d contents=%s\n", size, nmemb, contents);
 	realsize := size * nmemb// TODO size_t ?
 	// if !isnil(mem.ws_func) {