Fix "pointer is null" static analyzer warning. NFCI.

Use cast<> instead of dyn_cast<> since we know that the pointer should be valid (and is dereferenced immediately).

diff --git a/clang/lib/ARCMigrate/ObjCMT.cpp b/clang/lib/ARCMigrate/ObjCMT.cpp
index 4abb04f..8b3a4a3 100644 (file)
--- a/clang/lib/ARCMigrate/ObjCMT.cpp
+++ b/clang/lib/ARCMigrate/ObjCMT.cpp
@@ -1092,7 +1092,7 @@ static bool AvailabilityAttrsMatch(Attr *At1, Attr *At2) {
   const AvailabilityAttr *AA1 = dyn_cast<AvailabilityAttr>(At1);
   if (!AA1)
     return true;
-  const AvailabilityAttr *AA2 = dyn_cast<AvailabilityAttr>(At2);
+  const AvailabilityAttr *AA2 = cast<AvailabilityAttr>(At2);
 
   VersionTuple Introduced1 = AA1->getIntroduced();
   VersionTuple Deprecated1 = AA1->getDeprecated();