Debugger: DOS MCBS command should indicate the segment immediately following the last MCB block in the chain

CHANGELOG

@@ -1,4 +1,6 @@
 Next version
+  - Debugger: DOS MCBS command now also prints the segment immediately
+    following the last MCB block (joncampbell123).
   - Tseng ET3000/ET4000: Update Status register 3DAh behavior when emulating
     Tseng chipsets to reflect Tseng datasheet, and VGAKIT SVGA detection code
     expectations. Bit 7 is expected, as documented by Tseng, to be the inverse

src/debug/debug.cpp

@@ -4688,13 +4688,15 @@ static void LogMCBChain(uint16_t mcb_segment) {
 		}
 
 		// if we've just processed the last MCB in the chain, break out of the loop
-		if (mcb.GetType()==0x5a) {
-			break;
-		}
-		// else, move to the next MCB in the chain
 		mcb_segment+=mcb.GetSize()+1;
+		if (mcb.GetType()==0x5a)
+			break;
+
+		// else, move to the next MCB in the chain
 		mcb.SetPt(mcb_segment);
 	}
+
+	DEBUG_ShowMsg("   %04X  END OF CHAIN",mcb_segment);
 }
 
 #include "regionalloctracking.h"