fixes TC-5784 - check that the view's layout is not null before compa…

…ring it to horizontal or vertical layout arrangements

android/modules/ui/src/java/ti/modules/titanium/ui/widget/TiView.java

@@ -20,7 +20,7 @@ public TiView(TiViewProxy proxy) {
 		super(proxy);
 		LayoutArrangement arrangement = LayoutArrangement.DEFAULT;
 
-		if (proxy.hasProperty(TiC.PROPERTY_LAYOUT)) {
+		if (proxy.hasPropertyAndNotNull(TiC.PROPERTY_LAYOUT)) {
 			String layoutProperty = TiConvert.toString(proxy.getProperty(TiC.PROPERTY_LAYOUT));
 			if (layoutProperty.equals(TiC.LAYOUT_HORIZONTAL)) {
 				arrangement = LayoutArrangement.HORIZONTAL;

android/titanium/src/java/org/appcelerator/kroll/KrollProxy.java

@@ -563,6 +563,16 @@ public boolean hasProperty(String name)
 		return properties.containsKey(name);
 	}
 
+	/**
+	 * @param name  the lookup key.
+	 * @return  true if the proxy contains this property and it is not null, false otherwise.
+	 * @module.api
+	 */
+	public boolean hasPropertyAndNotNull(String name)
+	{
+		return properties.containsKeyAndNotNull(name);
+	}
+
 	/**
 	 * Returns the property value given its key.
 	 * Properties are cached on the Proxy and updated from JS for relevant annotated APIs

android/titanium/src/java/org/appcelerator/titanium/util/TiConvert.java

@@ -546,7 +546,7 @@ public static double toDouble(HashMap<String, Object> hashMap, String key)
 	}
 
 	/**
-	 * Converts a vlaue into a String. If value is null, a default value is returned.
+	 * Converts a value into a String. If value is null, a default value is returned.
 	 * @param value the value to convert.
 	 * @param defaultString the default value.
 	 * @return a String.