Round texture UVs to a half-texel before encoding

This fixes problems with torches and some other blocks when
the texture atlas is large.

src/main/java/me/jellysquid/mods/sodium/client/render/chunk/vertex/format/impl/CompactChunkVertex.java

@@ -97,8 +97,8 @@ private static int encodeLight(int light) {
         private int encodeTexture(float u, float v) {
             // Transform the normalized coordinates back into half-texel coordinates, and then scale it
             // to the full addressing range the shader uses.
-            var scaledU = (int) ((u * this.atlasWidth) * this.textureScaleU);
-            var scaledV = (int) ((v * this.atlasHeight) * this.textureScaleV);
+            var scaledU = Math.round(u * this.atlasWidth) * this.textureScaleU;
+            var scaledV = Math.round(v * this.atlasHeight) * this.textureScaleV;
 
             return ((scaledU & 0xFFFF) << 0) | ((scaledV & 0xFFFF) << 16);
         }