Fix rem condition

Author: newpavlov

library/core/src/num/int_macros.rs

@@ -695,9 +695,9 @@ macro_rules! int_impl {
                 // SAFETY: div by zero and by INT_MIN have been checked above
                 unsafe {
                     if unlikely!(intrinsics::unchecked_rem(self, rhs) == 0) {
-                        None
-                    } else {
                         Some(intrinsics::unchecked_div(self, rhs))
+                    } else {
+                        None
                     }
                 }
             }

library/core/src/num/uint_macros.rs

@@ -681,9 +681,9 @@ macro_rules! uint_impl {
                 // failure modes for division
                 unsafe {
                     if unlikely!(intrinsics::unchecked_rem(self, rhs) == 0) {
-                        None
-                    } else {
                         Some(intrinsics::unchecked_div(self, rhs))
+                    } else {
+                        None
                     }
                 }
             }