[NFC] [Clang] Fix static analyzer concern

[eandrews]

Summary

Fix static analyzer concern about potential null value dereference. findBackingIvar() dereferences Prop. PR checks that Prop exists before calling the function.

[aaron.ballman]

LGTM with a small formatting nit.

clang/lib/Analysis/BodyFarm.cpp

809

Formatting.

[eandrews]

In D157429#4570540, @aaron.ballman wrote:

LGTM with a small formatting nit.

Thanks for the review! I committed the patch after fixing the formatting

clang/lib/Analysis/BodyFarm.cpp

for (const auto *PI : ImpD->property_impls()) {
           IVar = Prop->getPropertyIvarDecl();
         }
       }
     }
   }
 
   if (!IVar) {
     Prop = MD->findPropertyDecl();
-    IVar = findBackingIvar(Prop);
+    IVar = Prop ? findBackingIvar(Prop) : nullptr;
   }
 
   if (!IVar || !Prop)
     return nullptr;
 
   // Ignore weak variables, which have special behavior.
   if (Prop->getPropertyAttributes() & ObjCPropertyAttribute::kind_weak)
     return nullptr;