Fixed a documentation typo.

modules/juce_graphics/contexts/juce_GraphicsContext.h

@@ -545,7 +545,7 @@ public:
     /** Draws an image to fit within a designated rectangle.
 
         @param imageToDraw              the source image to draw
-        @param destArea                 the target rectangle to fit it into
+        @param targetArea               the target rectangle to fit it into
         @param placementWithinTarget    this specifies how the image should be positioned
                                         within the target rectangle - see the RectanglePlacement
                                         class for more details about this.