GLSLNodeBuilder: Fix texelFetch lod type. (#33399)

Author: Mugen87

src/renderers/webgl-fallback/nodes/GLSLNodeBuilder.js

@@ -478,23 +478,23 @@ ${ flowData.code }
 
 			if ( offsetSnippet ) {
 
-				snippet = `texelFetchOffset( ${ textureProperty }, ivec3( ${ uvIndexSnippet }, ${ depthSnippet } ), ${ levelSnippet }, ${ offsetSnippet } )`;
+				snippet = `texelFetchOffset( ${ textureProperty }, ivec3( ${ uvIndexSnippet }, ${ depthSnippet } ), int( ${ levelSnippet } ), ${ offsetSnippet } )`;
 
 			} else {
 
-				snippet = `texelFetch( ${ textureProperty }, ivec3( ${ uvIndexSnippet }, ${ depthSnippet } ), ${ levelSnippet } )`;
+				snippet = `texelFetch( ${ textureProperty }, ivec3( ${ uvIndexSnippet }, ${ depthSnippet } ), int( ${ levelSnippet } ) )`;
 
 			}
 
 		} else {
 
 			if ( offsetSnippet ) {
 
-				snippet = `texelFetchOffset( ${ textureProperty }, ${ uvIndexSnippet }, ${ levelSnippet }, ${ offsetSnippet } )`;
+				snippet = `texelFetchOffset( ${ textureProperty }, ${ uvIndexSnippet }, int( ${ levelSnippet } ), ${ offsetSnippet } )`;
 
 			} else {
 
-				snippet = `texelFetch( ${ textureProperty }, ${ uvIndexSnippet }, ${ levelSnippet } )`;
+				snippet = `texelFetch( ${ textureProperty }, ${ uvIndexSnippet }, int( ${ levelSnippet } ) )`;
 
 			}