Fix max number of samples in experiments on non-64-bit systems.

The use of `math.MaxInt64` as the maximum number of samples in the context
of general int variables can lead to inconsistent behavior on non-64-bit
systems.

This patch addresses this by using `math.MaxInt32` as the default sample
size in case an explicit one is not provided in the `SamplingConfig`.

Signed-off-by: Nashwan Azhari <nazhari@cloudbasesolutions.com>

gmeasure/experiment.go

@@ -452,7 +452,7 @@ func (e *Experiment) Sample(callback func(idx int), samplingConfig SamplingConfi
 	if samplingConfig.Duration > 0 {
 		maxTime = time.Now().Add(samplingConfig.Duration)
 	}
-	maxN := math.MaxInt64
+	maxN := math.MaxInt32
 	if samplingConfig.N > 0 {
 		maxN = samplingConfig.N
 	}