Apply suggestions from code review

Co-authored-by: Athan <kgryte@gmail.com>
Signed-off-by: Athan <kgryte@gmail.com>

Author: kgryte

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

@@ -69,13 +69,13 @@ void API_SUFFIX(stdlib_strided_ddiff)( const CBLAS_INT N, const CBLAS_INT k, con
 */
 static void stdlib_strided_base_ddiff_ndarray( const CBLAS_INT N, const double *X, const CBLAS_INT strideX, const CBLAS_INT offsetX, const CBLAS_INT N1, const double *Prepend, const CBLAS_INT strideP, const CBLAS_INT offsetP, const CBLAS_INT N2, const double *Append, const CBLAS_INT strideA, const CBLAS_INT offsetA, double *Out, const CBLAS_INT strideOut, const CBLAS_INT offsetOut ) {
 	CBLAS_INT total;
-	double prev;
-	double curr;
 	CBLAS_INT ix;
 	CBLAS_INT ip;
 	CBLAS_INT ia;
 	CBLAS_INT io;
 	CBLAS_INT i;
+	double prev;
+	double curr;
 
 	total = N + N1 + N2;
 	if ( total <= 1 ) {