revert colour multiplication

osu.Game.Resources/Shaders/sh_CircularFlashlight.fs

@@ -5,5 +5,5 @@ vec4 getColourAt(vec2 diff, vec2 size, vec4 originalColour)
     float dist = length(diff);
     float flashlightRadius = length(size);
 
-    return vec4(originalColour.xyz, smoothstep(flashlightRadius, flashlightRadius * smoothness, dist));
+    return originalColour * vec4(1.0, 1.0, 1.0, smoothstep(flashlightRadius, flashlightRadius * smoothness, dist));
 }

osu.Game.Resources/Shaders/sh_RectangularFlashlight.fs

@@ -6,5 +6,5 @@ vec4 getColourAt(vec2 diff, vec2 size, vec4 originalColour)
 
     float alpha = length(smoothstep(size, size * smoothness, diff));
 
-    return vec4(originalColour.xyz, alpha);
+    return originalColour * vec4(1.0, 1.0, 1.0, alpha);
 }