zoom plugin: add zoom scroll speed configuration

runelite-client/src/main/java/net/runelite/client/plugins/zoom/ZoomConfig.java

@@ -97,4 +97,16 @@ public interface ZoomConfig extends Config
 	{
 		return 512;
 	}
+
+	@ConfigItem(
+		keyName = "zoomIncrement",
+		name = "Zoom Speed",
+		description = "Speed of zoom",
+		position = 6
+	)
+	default int zoomIncrement()
+	{
+		return 25;
+	}
+
 }

runelite-client/src/main/java/net/runelite/client/plugins/zoom/ZoomPlugin.java

@@ -56,6 +56,7 @@ public class ZoomPlugin extends Plugin implements KeyListener
 	 * Larger values trigger an overflow in the engine's fov to scale code.
 	 */
 	private static final int INNER_ZOOM_LIMIT = 1004;
+	private static final int DEFAULT_ZOOM_INCREMENT = 25;
 
 	private boolean controlDown;
 	
@@ -109,6 +110,12 @@ public class ZoomPlugin extends Plugin implements KeyListener
 			return;
 		}
 
+		if ("scrollWheelZoomIncrement".equals(event.getEventName()) && zoomConfig.zoomIncrement() != DEFAULT_ZOOM_INCREMENT)
+		{
+			intStack[intStackSize - 1] = zoomConfig.zoomIncrement();
+			return;
+		}
+
 		if (zoomConfig.innerLimit())
 		{
 			// This lets the options panel's slider have an exponential rate

runelite-client/src/main/scripts/ScrollWheelZoomHandler.rs2asm

@@ -11,6 +11,8 @@
    iconst                 0
    iload                  0
    iconst                 25
+   sconst                "scrollWheelZoomIncrement"
+   runelite_callback
    multiply              
    sub                   
    istore                 1