Fixed missing hardness on unimplemented blocks causing gameplay issues

src/pocketmine/block/DaylightSensor.php

@@ -32,4 +32,8 @@ class DaylightSensor extends Transparent{
 	public function getName(){
 		return "Daylight Sensor";
 	}
+
+	public function getHardness(){
+		return 0.2;
+	}
 }

src/pocketmine/block/Rail.php

@@ -32,4 +32,8 @@ class Rail extends Flowable{
 	public function getName(){
 		return "Rail";
 	}
+
+	public function getHardness(){
+		return 0.7;
+	}
 }

src/pocketmine/block/StoneButton.php

@@ -32,4 +32,8 @@ class StoneButton extends Flowable{
 	public function getName(){
 		return "Stone Button";
 	}
+
+	public function getHardness(){
+		return 0.5;
+	}
 }

src/pocketmine/block/StonePressurePlate.php

@@ -36,4 +36,8 @@ class StonePressurePlate extends Transparent{
 	public function isSolid(){
 		return false;
 	}
+
+	public function getHardness(){
+		return 0.5;
+	}
 }

src/pocketmine/block/WeightedPressurePlateLight.php

@@ -36,4 +36,8 @@ class WeightedPressurePlateLight extends Transparent{
 	public function isSolid(){
 		return false;
 	}
+
+	public function getHardness(){
+		return 0.5;
+	}
 }