fix: fill y with beta if beta is zero

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---

Author: DivitJain26

lib/node_modules/@stdlib/blas/base/chpmv/lib/base.js

@@ -111,7 +111,7 @@ function chpmv( order, uplo, N, alpha, AP, strideAP, offsetAP, x, strideX, offse
 
 	// y = beta*y
 	if ( rebeta === 0.0 && imbeta === 0.0 ) {
-		cfill( N, alpha, y, strideY, offsetY );
+		cfill( N, beta, y, strideY, offsetY );
 	} else if ( rebeta !== 1.0 || imbeta !== 0.0 ) {
 		cscal( N, beta, y, strideY, offsetY );
 	}