Remove stacktrace from the Missing Texture error log

The log shows exactly which texture is missing already. The stack trace is just for loadTexture which isn't useful to know (and clogs up the log file).

Example error log before patch:

    [23:12:12] [Client thread/ERROR]: Using missing texture, unable to load forestry:textures/items/misc/liquid.png
    java.io.FileNotFoundException: forestry:textures/items/misc/liquid.png
    	at net.minecraft.client.resources.FallbackResourceManager.getResource(FallbackResourceManager.java:65) ~[FallbackResourceManager.class:?]
    	at net.minecraft.client.resources.SimpleReloadableResourceManager.getResource(SimpleReloadableResourceManager.java:67) ~[SimpleReloadableResourceManager.class:?]
    	at net.minecraft.client.renderer.texture.TextureMap.loadTextureAtlas(TextureMap.java:126) [TextureMap.class:?]
    	at net.minecraft.client.renderer.texture.TextureMap.loadTexture(TextureMap.java:91) [TextureMap.class:?]
    	at net.minecraft.client.renderer.texture.TextureManager.loadTexture(TextureManager.java:89) [TextureManager.class:?]
    	at net.minecraft.client.renderer.texture.TextureManager.onResourceManagerReload(TextureManager.java:170) [TextureManager.class:?]
    	at net.minecraft.client.resources.SimpleReloadableResourceManager.notifyReloadListeners(SimpleReloadableResourceManager.java:134) [SimpleReloadableResourceManager.class:?]
    	at net.minecraft.client.resources.SimpleReloadableResourceManager.reloadResources(SimpleReloadableResourceManager.java:118) [SimpleReloadableResourceManager.class:?]
    	at net.minecraft.client.Minecraft.refreshResources(Minecraft.java:653) [Minecraft.class:?]
    	at cpw.mods.fml.client.FMLClientHandler.finishMinecraftLoading(FMLClientHandler.java:303) [FMLClientHandler.class:?]
    	at net.minecraft.client.Minecraft.startGame(Minecraft.java:596) [Minecraft.class:?]
    	at net.minecraft.client.Minecraft.run(Minecraft.java:941) [Minecraft.class:?]
    	at net.minecraft.client.main.Main.main(Main.java:164) [Main.class:?]
    	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.7.0_67]
    	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) ~[?:1.7.0_67]
    	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.7.0_67]
    	at java.lang.reflect.Method.invoke(Method.java:606) ~[?:1.7.0_67]
    	at net.minecraft.launchwrapper.Launch.launch(Launch.java:134) [launchwrapper-1.9.jar:?]
    	at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.9.jar:?]
    	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.7.0_67]
    	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) ~[?:1.7.0_67]
    	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.7.0_67]
    	at java.lang.reflect.Method.invoke(Method.java:606) ~[?:1.7.0_67]
    	at GradleStart.bounce(GradleStart.java:107) [start/:?]
    	at GradleStart.startClient(GradleStart.java:100) [start/:?]
    	at GradleStart.main(GradleStart.java:55) [start/:?]

Example error log after patch:

    [01:21:48] [Client thread/ERROR]: Using missing texture, unable to load forestry:textures/items/misc/liquid.png