chore: fix C lint errors

PR-URL: #5206
Closes: #5155

Reviewed-by: Athan Reines <kgryte@gmail.com>
Reviewed-by: Philipp Burckhardt <pburckhardt@outlook.com>

Author: gkbishnoi07

lib/node_modules/@stdlib/stats/base/dnanvariancetk/examples/c/example.c

@@ -22,7 +22,7 @@
 
 int main( void ) {
 	// Create a strided array:
-	double x[] = { 1.0, 2.0, 0.0/0.0, 3.0, 0.0/0.0, 4.0, 5.0, 6.0, 0.0/0.0, 7.0, 8.0, 0.0/0.0 };
+	const double x[] = { 1.0, 2.0, 0.0/0.0, 3.0, 0.0/0.0, 4.0, 5.0, 6.0, 0.0/0.0, 7.0, 8.0, 0.0/0.0 };
 
 	// Specify the number of elements:
 	int64_t N = 6;

lib/node_modules/@stdlib/stats/base/dsnanmean/benchmark/c/benchmark.length.c

@@ -107,6 +107,7 @@ static double benchmark( int iterations, int len ) {
 	v = 0.0;
 	t = tic();
 	for ( i = 0; i < iterations; i++ ) {
+		// cppcheck-suppress uninitvar
 		v = stdlib_strided_dsnanmean( len, x, 1 );
 		if ( v != v ) {
 			printf( "should not return NaN\n" );