Bug 1583854: Fix a build issue that prevented builds with the macOS 10.15 SDK from succeeding. Based on a patch by Pete Collins. r=mstange

Differential Revision: https://phabricator.services.mozilla.com/D64447

--HG--
extra : moz-landing-system : lando

modules/libmar/verify/MacVerifyCrypto.cpp

@@ -16,7 +16,7 @@ extern "C" {
 #endif
 const CFStringRef kSecTransformInputAttributeName = CFSTR("INPUT");
 typedef CFTypeRef SecTransformRef;
-typedef struct OpaqueSecKeyRef* SecKeyRef;
+typedef OpaqueSecKeyRef* SecKeyRef;
 
 typedef SecTransformRef (*SecTransformCreateReadTransformWithReadStreamFunc)(
     CFReadStreamRef inputStream);