[orx-temporal-blur] Fix TemporalBlur compatibility with ProgramImplementation

orx-temporal-blur/src/demo/kotlin/DemoBasic01.kt

@@ -5,16 +5,10 @@ import org.openrndr.math.Polar
 
 fun main() = application {
     program {
-        if (System.getProperty("takeScreenshot") == "true") {
-            extend(SingleScreenshot()) {
-                this.outputFile = System.getProperty("screenshotPath")
-            }
-        }
         extend(TemporalBlur()) {
             samples = 10
             duration = 0.9
         }
-
         extend {
             drawer.circle(Polar(seconds * 360.0, 200.0).cartesian + drawer.bounds.center, 50.0)
         }

orx-temporal-blur/src/demo/kotlin/DemoColorShift01.kt

@@ -1,18 +1,12 @@
 import org.openrndr.application
 import org.openrndr.color.ColorRGBa
 import org.openrndr.draw.tint
-import org.openrndr.extensions.SingleScreenshot
 import org.openrndr.extra.temporalblur.TemporalBlur
 import org.openrndr.math.Polar
 import kotlin.math.cos
 
 fun main() = application {
     program {
-        if (System.getProperty("takeScreenshot") == "true") {
-            extend(SingleScreenshot()) {
-                this.outputFile = System.getProperty("screenshotPath")
-            }
-        }
         extend(TemporalBlur()) {
             samples = 100
             duration = 10.0

orx-temporal-blur/src/main/kotlin/TemporalBlur.kt

@@ -3,6 +3,7 @@ package org.openrndr.extra.temporalblur
 import org.intellij.lang.annotations.Language
 import org.openrndr.Extension
 import org.openrndr.Program
+import org.openrndr.ProgramImplementation
 import org.openrndr.color.ColorRGBa
 import org.openrndr.draw.*
 import org.openrndr.extra.noise.uniformRing
@@ -179,7 +180,7 @@ class TemporalBlur : Extension {
             program.clock = { oldClockValue - (i * duration) / (fps * samples) }
 
             // I guess we need something better here.
-            val fsf = Program::class.java.getDeclaredField("frameSeconds")
+            val fsf = ProgramImplementation::class.java.getDeclaredField("frameSeconds")
             fsf.isAccessible = true
             fsf.setDouble(program, program.clock())
 
@@ -229,7 +230,7 @@ class TemporalBlur : Extension {
 
         // restore clock
         program.clock = oldClock
-        val fsf = Program::class.java.getDeclaredField("frameSeconds")
+        val fsf = ProgramImplementation::class.java.getDeclaredField("frameSeconds")
         fsf.isAccessible = true
         fsf.setDouble(program,  oldClockTime)
     }