fix: apply code review suggestion

Author: headlessNode

lib/node_modules/@stdlib/blas/ext/base/dnannsumors/src/main.c

@@ -51,11 +51,11 @@ double API_SUFFIX(stdlib_strided_dnannsumors_ndarray)( const CBLAS_INT N, const
 	CBLAS_INT i;
 
 	sum = 0.0;
+	*n = 0;
 	if ( N <= 0 ) {
 		return sum;
 	}
 	ix = offsetX;
-	*n = 0;
 	if ( strideX == 0 ) {
 		if ( stdlib_base_is_nan( X[ ix ] ) ) {
 			return sum;