Check for >0 instead of !=0

[mitchej123]

Fixes the error I was seeing with lwjglxdebug

    Description : Invalid key -1
    Stacktrace  :
org.lwjgl.glfw.GLFWErrorCallbackI.callback(GLFWErrorCallbackI.java:43)
org.lwjgl.system.JNI.invokePI(Native Method)
org.lwjgl.glfw.GLFW.glfwGetKey(GLFW.java:3746)
org.lwjglx.debug.$Proxy$4840.glfwGetKey577(Unknown Source)
org.lwjglx.input.Keyboard.isKeyDown(Keyboard.java:263)
net.minecraft.client.settings.KeyBinding.hodgepodge$updateKeyStates(KeyBinding.java:590)
net.minecraft.client.Minecraft.handler$zeb000$hodgepodge$updateKeysStates(Minecraft.java:6596)
net.minecraft.client.Minecraft.setIngameFocus(Minecraft.java:1386)
net.minecraft.client.Minecraft.displayGuiScreen(Minecraft.java:871)
net.minecraft.client.gui.GuiChat.keyTyped(GuiChat.java:119)