More 'nullptr' updates and minor clean-ups.

src/native/android/juce_android_CameraDevice.cpp

@@ -66,7 +66,7 @@ Component* CameraDevice::createViewerComponent()
 {
     // TODO
 
-    return 0;
+    return nullptr;
 }
 
 const String CameraDevice::getFileExtension()
@@ -115,7 +115,7 @@ CameraDevice* CameraDevice::openDevice (int index,
 {
     // TODO
 
-    return 0;
+    return nullptr;
 }
 
 

src/native/android/juce_android_Fonts.cpp

@@ -157,7 +157,7 @@ public:
         const Rectangle<int> bounds (left, top, right - left, bottom - top);
 
         if (bounds.isEmpty())
-            return 0;
+            return nullptr;
 
         jint* const maskDataElements = env->GetIntArrayElements (maskData, 0);
 

src/native/android/juce_android_Midi.cpp

@@ -43,7 +43,7 @@ int MidiOutput::getDefaultDeviceIndex()
 
 MidiOutput* MidiOutput::openDevice (int index)
 {
-    return 0;
+    return nullptr;
 }
 
 MidiOutput::~MidiOutput()
@@ -100,7 +100,7 @@ const StringArray MidiInput::getDevices()
 
 MidiInput* MidiInput::openDevice (int index, MidiInputCallback* callback)
 {
-    return 0;
+    return nullptr;
 }
 
 

src/native/android/juce_android_NativeCode.cpp

@@ -326,7 +326,7 @@ public:
             if (threads[i] == thisThread)
                 return envs[i];
 
-        return 0;
+        return nullptr;
     }
 
     enum { maxThreads = 16 };

src/native/android/juce_android_Network.cpp

@@ -152,7 +152,7 @@ InputStream* URL::createNativeStream (const String& address, bool isPost, const
                                                            progressCallback, progressCallbackContext,
                                                            headers, timeOutMs, responseHeaders));
 
-    return wi->stream != 0 ? wi.release() : 0;
+    return wi->stream != 0 ? wi.release() : nullptr;
 }
 
 #endif

src/native/android/juce_android_OpenGLComponent.cpp

@@ -32,12 +32,12 @@
 // TODO
 OpenGLContext* OpenGLComponent::createContext()
 {
-    return 0;
+    return nullptr;
 }
 
 void* OpenGLComponent::getNativeWindowHandle() const
 {
-    return 0;
+    return nullptr;
 }
 
 void juce_glViewport (const int w, const int h)

src/native/android/juce_android_Windowing.cpp

@@ -433,7 +433,7 @@ public:
                 return ap;
         }
 
-        return 0;
+        return nullptr;
     }
 
     static ModifierKeys currentModifiers;
@@ -608,7 +608,7 @@ bool JUCE_CALLTYPE NativeMessageBox::showOkCancelBox (AlertWindow::AlertIconType
 
     android.activity.callVoidMethod (android.showOkCancelBox, javaString (title).get(), javaString (message).get(),
                                      (jlong) (pointer_sized_int) callback);
-    return 0;
+    return false;
 }
 
 int JUCE_CALLTYPE NativeMessageBox::showYesNoCancelBox (AlertWindow::AlertIconType iconType,
@@ -673,8 +673,8 @@ const Image juce_createIconForFile (const File& file)
 }
 
 //==============================================================================
-void* MouseCursor::createMouseCursorFromImage (const Image&, int, int)                          { return 0; }
-void* MouseCursor::createStandardMouseCursor (const MouseCursor::StandardCursorType)            { return 0; }
+void* MouseCursor::createMouseCursorFromImage (const Image&, int, int)                          { return nullptr; }
+void* MouseCursor::createStandardMouseCursor (const MouseCursor::StandardCursorType)            { return nullptr; }
 void MouseCursor::deleteMouseCursor (void* const /*cursorHandle*/, const bool /*isStandard*/)   {}
 
 //==============================================================================