[NFCI] Return PathSensitiveBugReport where appropriate

Some compilers have trouble converting unique_ptr<PathSensitiveBugReport> to
unique_ptr<BugReport> causing some functions to fail to compile.
Changing the return type of the functions that fail to compile does not
appear to have any issues.
I ran into this issue building with clang 3.8 on Ubuntu 16.04.

llvm-svn: 372668
(cherry picked from commit 86c3af9)

Author: bulbazord

clang/lib/StaticAnalyzer/Checkers/MacOSKeychainAPIChecker.cpp

@@ -113,8 +113,10 @@ class MacOSKeychainAPIChecker : public Checker<check::PreStmt<CallExpr>,
   const ExplodedNode *getAllocationNode(const ExplodedNode *N, SymbolRef Sym,
                                         CheckerContext &C) const;
 
-  std::unique_ptr<BugReport> generateAllocatedDataNotReleasedReport(
-      const AllocationPair &AP, ExplodedNode *N, CheckerContext &C) const;
+  std::unique_ptr<PathSensitiveBugReport>
+  generateAllocatedDataNotReleasedReport(const AllocationPair &AP,
+                                         ExplodedNode *N,
+                                         CheckerContext &C) const;
 
   /// Mark an AllocationPair interesting for diagnostic reporting.
   void markInteresting(PathSensitiveBugReport *R,
@@ -467,7 +469,7 @@ MacOSKeychainAPIChecker::getAllocationNode(const ExplodedNode *N,
   return AllocNode;
 }
 
-std::unique_ptr<BugReport>
+std::unique_ptr<PathSensitiveBugReport>
 MacOSKeychainAPIChecker::generateAllocatedDataNotReleasedReport(
     const AllocationPair &AP, ExplodedNode *N, CheckerContext &C) const {
   const ADFunctionInfo &FI = FunctionsToTrack[AP.second->AllocatorIdx];

clang/lib/StaticAnalyzer/Checkers/NonNullParamChecker.cpp

@@ -35,11 +35,11 @@ class NonNullParamChecker
 
   void checkPreCall(const CallEvent &Call, CheckerContext &C) const;
 
-  std::unique_ptr<BugReport>
+  std::unique_ptr<PathSensitiveBugReport>
   genReportNullAttrNonNull(const ExplodedNode *ErrorN,
                            const Expr *ArgE,
                            unsigned IdxOfArg) const;
-  std::unique_ptr<BugReport>
+  std::unique_ptr<PathSensitiveBugReport>
   genReportReferenceToNullPointer(const ExplodedNode *ErrorN,
                                   const Expr *ArgE) const;
 };
@@ -179,7 +179,7 @@ void NonNullParamChecker::checkPreCall(const CallEvent &Call,
   C.addTransition(state);
 }
 
-std::unique_ptr<BugReport>
+std::unique_ptr<PathSensitiveBugReport>
 NonNullParamChecker::genReportNullAttrNonNull(const ExplodedNode *ErrorNode,
                                               const Expr *ArgE,
                                               unsigned IdxOfArg) const {
@@ -204,7 +204,8 @@ NonNullParamChecker::genReportNullAttrNonNull(const ExplodedNode *ErrorNode,
   return R;
 }
 
-std::unique_ptr<BugReport> NonNullParamChecker::genReportReferenceToNullPointer(
+std::unique_ptr<PathSensitiveBugReport>
+NonNullParamChecker::genReportReferenceToNullPointer(
     const ExplodedNode *ErrorNode, const Expr *ArgE) const {
   if (!BTNullRefArg)
     BTNullRefArg.reset(new BuiltinBug(this, "Dereference of null pointer"));