cgen: optional fixes; make http compile

vlib/net/http/http.v

@@ -28,11 +28,11 @@ mut:
 pub struct FetchConfig {
 pub mut:
 	method     string
-	data       string=''
+	data       string
-	params     map[string]string=map[string]string
+	params     map[string]string
-	headers    map[string]string=map[string]string
+	headers    map[string]string
-	cookies    map[string]string=map[string]string
+	cookies    map[string]string
-	user_agent string='v'
+	user_agent string//='v' QTODO
 	verbose    bool=false
 }
 

vlib/v/gen/cgen.v

@@ -1858,7 +1858,8 @@ fn (g mut Gen) return_statement(node ast.Return) {
 				}
 				ast.CallExpr {
 					// TODO: why?
-					if !it.is_method {
+					// if !it.is_method {
+					if it.name == 'error' {
 						is_error = true						// TODO check name 'error'
 					}
 				}
@@ -2564,9 +2565,15 @@ fn (g mut Gen) fn_call(node ast.CallExpr) {
 			// println(var) or println println(str.var)
 			expr := node.args[0].expr
 			is_var := match expr {
-				ast.SelectorExpr { true }
+				ast.SelectorExpr {
-				ast.Ident { true }
+					true
-				else { false }
+				}
+				ast.Ident {
+					true
+				}
+				else {
+					false
+				}
 			}
 			// `println(int_str(10))`
 			// sym := g.table.get_type_symbol(node.args[0].typ)
@@ -3117,7 +3124,6 @@ fn (g mut Gen) gen_str_for_struct(info table.Struct, styp string) {
 			g.gen_str_for_type(sym, field_styp)
 		}
 	}
-
 	s := styp.replace('.', '__')
 	g.definitions.write('string ${s}_str($styp it, int indent_count) {\n')
 	// generate ident / indent length = 4 spaces
@@ -3154,7 +3160,7 @@ fn (g mut Gen) gen_str_for_struct(info table.Struct, styp string) {
 fn (g Gen) type_to_fmt(typ table.Type) string {
 	sym := g.table.get_type_symbol(typ)
 	if sym.kind == .struct_ {
-		return "%.*s"
+		return '%.*s'
 	} else if typ == table.string_type {
 		return "\'%.*s\'"
 	} else if typ == table.bool_type {