bench: fix type

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

Author: kgryte

lib/node_modules/@stdlib/stats/base/ndarray/smaxabs/benchmark/c/benchmark.length.c

@@ -114,7 +114,7 @@ static double benchmark( int iterations, int len ) {
 	int64_t ndims;
 	float *data;
 	float v;
-	float t;
+	double t;
 	int i;
 
 	ndims = 1;