Refactor: Simplify boolean conditional return statements in lib/StaticAnalyzer/Checkers

Summary: Use clang-tidy to simplify boolean conditional return values

Reviewers: dcoughlin, krememek

Subscribers: krememek, cfe-commits

Patch by Richard Thomson!

Differential Revision: http://reviews.llvm.org/D10021

llvm-svn: 256491
diff --git a/clang/lib/StaticAnalyzer/Checkers/ObjCSelfInitChecker.cpp b/clang/lib/StaticAnalyzer/Checkers/ObjCSelfInitChecker.cpp
index f344dd0..ffa3a27 100644
--- a/clang/lib/StaticAnalyzer/Checkers/ObjCSelfInitChecker.cpp
+++ b/clang/lib/StaticAnalyzer/Checkers/ObjCSelfInitChecker.cpp
@@ -404,10 +404,7 @@
     if (II == NSObjectII)
       break;
   }
-  if (!ID)
-    return false;
-
-  return true;
+  return ID != nullptr;
 }
 
 /// \brief Returns true if the location is 'self'.