Fixed the build check: ('arg' declared but not used) against the '-default-to-nil-allocator' fix for FreeBSD/OpenBSD/NetBSD/Linux.

core/os/os_freebsd.odin

@@ -967,7 +967,7 @@ _processor_core_count :: proc() -> int {
 @(private, require_results)
 _alloc_command_line_arguments :: proc() -> []string {
 	res := make([]string, len(runtime.args__))
-	for arg, i in res {
+	for _, i in res {
 		res[i] = string(runtime.args__[i])
 	}
 	return res

core/os/os_linux.odin

@@ -1100,7 +1100,7 @@ _processor_core_count :: proc() -> int {
 @(private, require_results)
 _alloc_command_line_arguments :: proc() -> []string {
 	res := make([]string, len(runtime.args__))
-	for arg, i in  res {
+	for _, i in  res {
 		res[i] = string(runtime.args__[i])
 	}
 	return res

core/os/os_netbsd.odin

@@ -1017,7 +1017,7 @@ _processor_core_count :: proc() -> int {
 @(private, require_results)
 _alloc_command_line_arguments :: proc() -> []string {
 	res := make([]string, len(runtime.args__))
-	for arg, i in res {
+	for _, i in res {
 		res[i] = string(runtime.args__[i])
 	}
 	return res

core/os/os_openbsd.odin

@@ -917,7 +917,7 @@ _processor_core_count :: proc() -> int {
 @(private, require_results)
 _alloc_command_line_arguments :: proc() -> []string {
 	res := make([]string, len(runtime.args__))
-	for arg, i in res {
+	for _, i in res {
 		res[i] = string(runtime.args__[i])
 	}
 	return res