transpile: operators: resolve type when checking for unsignedness

other code in operators.rs remembers to do this, but this method forgot

fixes #1024

Author: fw-immunant

c2rust-transpile/src/translator/operators.rs

@@ -506,7 +506,7 @@ impl<'c> Translation<'c> {
     ) -> TranslationResult<Box<Expr>> {
         let is_unsigned_integral_type = self
             .ast_context
-            .index(ctype)
+            .resolve_type(ctype)
             .kind
             .is_unsigned_integral_type();
 

c2rust-transpile/tests/snapshots/platform-specific/rnd.rs

@@ -24,7 +24,7 @@ pub unsafe extern "C" fn set_rand_seed(mut s: uint32_t) {
 pub unsafe extern "C" fn get_rand_seed() -> uint32_t {
     let INCREMENT: uint32_t = 1 as std::ffi::c_int as uint32_t;
     let MULTIPLIER: uint32_t = 0x15a4e35 as std::ffi::c_int as uint32_t;
-    cur_rand_seed = (MULTIPLIER * cur_rand_seed).wrapping_add(INCREMENT);
+    cur_rand_seed = MULTIPLIER.wrapping_mul(cur_rand_seed).wrapping_add(INCREMENT);
     let mut ret: uint32_t = abs(cur_rand_seed as int32_t) as uint32_t;
     return ret;
 }

c2rust-transpile/tests/snapshots/[email protected]

@@ -30,7 +30,7 @@ pub unsafe extern "C" fn set_rand_seed(mut s: uint32_t) {
 pub unsafe extern "C" fn get_rand_seed() -> uint32_t {
     let INCREMENT: uint32_t = 1 as std::ffi::c_int as uint32_t;
     let MULTIPLIER: uint32_t = 0x15a4e35 as std::ffi::c_int as uint32_t;
-    cur_rand_seed = (MULTIPLIER * cur_rand_seed).wrapping_add(INCREMENT);
+    cur_rand_seed = MULTIPLIER.wrapping_mul(cur_rand_seed).wrapping_add(INCREMENT);
     let mut ret: uint32_t = abs(cur_rand_seed as int32_t) as uint32_t;
     return ret;
 }

c2rust-transpile/tests/snapshots/[email protected]

@@ -28,7 +28,7 @@ pub unsafe extern "C" fn set_rand_seed(mut s: uint32_t) {
 pub unsafe extern "C" fn get_rand_seed() -> uint32_t {
     let INCREMENT: uint32_t = 1 as std::ffi::c_int as uint32_t;
     let MULTIPLIER: uint32_t = 0x15a4e35 as std::ffi::c_int as uint32_t;
-    cur_rand_seed = (MULTIPLIER * cur_rand_seed).wrapping_add(INCREMENT);
+    cur_rand_seed = MULTIPLIER.wrapping_mul(cur_rand_seed).wrapping_add(INCREMENT);
     let mut ret: uint32_t = abs(cur_rand_seed as int32_t) as uint32_t;
     return ret;
 }