Rollup merge of #142352 - workingjubilee:c-int-width-is-an-integer, r=wesleywiser

compiler: Make `c_int_width` an integer

Because it is.

That's all I got.

compiler/rustc_codegen_ssa/src/traits/type_.rs

@@ -44,10 +44,10 @@ pub trait DerivedTypeCodegenMethods<'tcx>:
     BaseTypeCodegenMethods + MiscCodegenMethods<'tcx> + HasTyCtxt<'tcx> + HasTypingEnv<'tcx>
 {
     fn type_int(&self) -> Self::Type {
-        match &self.sess().target.c_int_width[..] {
-            "16" => self.type_i16(),
-            "32" => self.type_i32(),
-            "64" => self.type_i64(),
+        match &self.sess().target.c_int_width {
+            16 => self.type_i16(),
+            32 => self.type_i32(),
+            64 => self.type_i64(),
             width => bug!("Unsupported c_int_width: {}", width),
         }
     }