use saturating_sub isntead of wrapping_sub

Author: olton

core/src/consensus.rs

@@ -76,7 +76,7 @@ pub fn relative_min_window_density(b1: &MinaConsensusState, b2: &MinaConsensusSt
     let projected_window = {
         // Compute shift count
         let shift_count = 
-            (max_slot.wrapping_sub(global_slot(b1) + 1)).clamp(0, SUB_WINDOWS_PER_WINDOW);
+            (max_slot.saturating_sub(global_slot(b1) + 1)).clamp(0, SUB_WINDOWS_PER_WINDOW);
 
         // Initialize projected window
         let mut projected_window = b1