refactor: avoid duplicated logic

Signed-off-by: Athan <[email protected]>

Author: kgryte

lib/node_modules/@stdlib/stats/base/variancech/lib/ndarray.js

@@ -67,13 +67,13 @@ function variancech( N, correction, x, strideX, offsetX ) {
 	if ( N <= 0 || n <= 0.0 ) {
 		return NaN;
 	}
+	if ( N === 1 || strideX === 0 ) {
+		return 0.0;
+	}
 	o = arraylike2object( x );
 	if ( o.accessorProtocol ) {
 		return accessors( N, correction, o, strideX, offsetX );
 	}
-	if ( N === 1 || strideX === 0 ) {
-		return 0.0;
-	}
 	ix = offsetX;
 
 	// Use an estimate for the mean: