STYLE: minor typos in comments

src/randomProcesses/windowModels/Hanning/Hanning.H

@@ -96,7 +96,7 @@ public:
     //- Construct from dictionary
     Hanning(const dictionary& dict, const label nSamples);
 
-    //- Destuctor
+    //- Destructor
     virtual ~Hanning();
 
 

src/randomProcesses/windowModels/uniform/uniform.H

@@ -72,7 +72,7 @@ public:
     //- Construct from dictionary
     uniform(const dictionary& dict, const label nSamples);
 
-    //- Destuctor
+    //- Destructor
     virtual ~uniform();
 };
 

src/randomProcesses/windowModels/windowModel/windowModel.H

@@ -97,7 +97,7 @@ public:
         );
 
 
-    //- Destuctor
+    //- Destructor
     virtual ~windowModel();