Fix typo

Author: davidungar

include/swift/AST/DiagnosticEngine.h

@@ -814,7 +814,7 @@ namespace swift {
     void setBufferIndirectlyCausingDiagnosticToInput(
         StringRef defaultDiagnosticInputFile);
     void resetBufferIndirectlyCausingDiagnostic();
-    SourceLoc getDefaultDiagnostLoc() const {
+    SourceLoc getDefaultDiagnosticLoc() const {
       return bufferIndirectlyCausingDiagnostic;
     }
   };

lib/AST/DiagnosticEngine.cpp

@@ -839,7 +839,7 @@ void DiagnosticEngine::emitDiagnostic(const Diagnostic &diagnostic) {
     Consumer->handleDiagnostic(SourceMgr, loc, toDiagnosticKind(behavior),
                                diagnosticStringFor(Info.ID),
                                diagnostic.getArgs(), Info,
-                               getDefaultDiagnostLoc());
+                               getDefaultDiagnosticLoc());
   }
 }