crypto: fix duplicated switch-case return values

PR-URL: nodejs#49030
Reviewed-By: Filip Skokan <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>

Author: 0o001

lib/internal/crypto/util.js

@@ -510,10 +510,14 @@ function getUsagesUnion(usageSet, ...usages) {
 
 function getBlockSize(name) {
   switch (name) {
-    case 'SHA-1': return 512;
-    case 'SHA-256': return 512;
-    case 'SHA-384': return 1024;
-    case 'SHA-512': return 1024;
+    case 'SHA-1':
+      // Fall through
+    case 'SHA-256':
+      return 512;
+    case 'SHA-384':
+      // Fall through
+    case 'SHA-512':
+      return 1024;
   }
 }