[melonjs#781] fix the WebGL renderer clearRect method

that was an easy peasy one after the changes made these last few days

Author: obiot

CHANGELOG

@@ -13,6 +13,7 @@ Version History
 * WebGLRenderer : optimized memory usage for shape drawing operations
 * WebGLRenderer : enable batching of triangle vertices to speed up shape drawing (when applicable)
 * WebGLRenderer : fixed a clipping issue with nested containers
+* WebGLRenderer : fixed the clearRect method
 
 6.2.0
 * Audio : fixed a regression when passing an initial volume value to the play function (thanks @PLAYERKILLERS)

src/video/canvas/canvas_renderer.js

@@ -159,8 +159,7 @@
         },
 
         /**
-         * Sets all pixels in the given rectangle to transparent black, <br>
-         * erasing any previously drawn content.
+         * Erase the pixels in the given rectangular area by setting them to transparent black (rgba(0,0,0,0)).
          * @name clearRect
          * @memberOf me.CanvasRenderer
          * @function

src/video/webgl/webgl_renderer.js

@@ -232,8 +232,7 @@
         },
 
         /**
-         * Sets all pixels in the given rectangle to transparent black,
-         * erasing any previously drawn content.
+         * Erase the pixels in the given rectangular area by setting them to transparent black (rgba(0,0,0,0)).
          * @name clearRect
          * @memberOf me.WebGLRenderer
          * @function
@@ -244,7 +243,7 @@
          */
         clearRect : function (x, y, width, height) {
             var color = this.currentColor.clone();
-            this.currentColor.copy("#0000");
+            this.currentColor.copy("#000000");
             this.fillRect(x, y, width, height);
             this.currentColor.copy(color);
             me.pool.push(color);