os,v.transformer: fix warnings for ./v -os cross -o vc/v.c cmd/v && clang-18 -o v_from_vc vc/v.c -lpthread

Author: spytheman

vlib/os/os.c.v

@@ -571,9 +571,9 @@ pub fn get_raw_line() string {
 		}
 	} $else {
 		max := usize(0)
-		buf := &char(0)
+		buf := unsafe { &u8(0) }
 		nr_chars := unsafe { C.getline(voidptr(&buf), &max, C.stdin) }
-		str := unsafe { tos(&u8(buf), if nr_chars < 0 { 0 } else { nr_chars }) }
+		str := unsafe { tos(buf, if nr_chars < 0 { 0 } else { nr_chars }) }
 		ret := str.clone()
 		$if !autofree {
 			unsafe {
@@ -616,7 +616,7 @@ pub fn get_raw_stdin() []u8 {
 		}
 	} $else {
 		max := usize(0)
-		buf := &char(0)
+		buf := unsafe { &u8(0) }
 		nr_chars := unsafe { C.getline(voidptr(&buf), &max, C.stdin) }
 		return array{
 			element_size: 1

vlib/v/transformer/transformer.v

@@ -1034,14 +1034,14 @@ pub fn (mut t Transformer) if_expr(mut node ast.IfExpr) ast.Expr {
 					match expr {
 						ast.IfExpr {
 							if expr.branches.len == 1 {
-								branch.stmts.pop()
+								branch.stmts.delete(branch.stmts.len - 1)
 								branch.stmts << expr.branches[0].stmts
 								break
 							}
 						}
 						ast.MatchExpr {
 							if expr.branches.len == 1 {
-								branch.stmts.pop()
+								branch.stmts.delete(branch.stmts.len - 1)
 								branch.stmts << expr.branches[0].stmts
 								break
 							}
@@ -1075,14 +1075,14 @@ pub fn (mut t Transformer) match_expr(mut node ast.MatchExpr) ast.Expr {
 					match expr {
 						ast.IfExpr {
 							if expr.branches.len == 1 {
-								branch.stmts.pop()
+								branch.stmts.delete(branch.stmts.len - 1)
 								branch.stmts << expr.branches[0].stmts
 								break
 							}
 						}
 						ast.MatchExpr {
 							if expr.branches.len == 1 {
-								branch.stmts.pop()
+								branch.stmts.delete(branch.stmts.len - 1)
 								branch.stmts << expr.branches[0].stmts
 								break
 							}