examples: fix `v -cflags "-Werror" test examples/`

examples/dynamic_library_loading/use.v

@@ -9,7 +9,7 @@ fn main() {
 	library_file_path := os.join_path(os.getwd(), dl.get_libname('library'))
 	handle := dl.open(library_file_path, dl.rtld_lazy)
 	eprintln('handle: ${ptr_str(handle)}')
-	mut f := &FNAdder(0)
+	mut f := FNAdder(0)
 	f = dl.sym(handle, 'add_1')
 	eprintln('f: ${ptr_str(f)}')
 	res := f(1, 2)

vlib/v/gen/c/comptime.v

@@ -249,11 +249,7 @@ fn (mut g Gen) comp_if(node ast.IfExpr) {
 		}
 		g.defer_ifdef = ''
 	}
-	if node.is_expr {
-		g.write('#endif')
-	} else {
 	g.writeln('#endif')
-	}
 }
 
 fn (mut g Gen) comp_if_cond(cond ast.Expr) bool {