Fix power generation speed in multiplayer depending on game options difficulty level.

Basically, any player that changed the game difficulty level to help them beat the campaign would end up accidentally cheating 10% extra power in multiplayer...

This cause different clients to disagree on the game state, but that's normal.

Changelog: Fix each player's power generation speed in multiplayer depending on the their game options difficulty level.

Author: Cyp

src/power.c

@@ -26,6 +26,8 @@
 
 #include "lib/framework/frame.h"
 
+#include "lib/netplay/netplay.h"
+
 #include "difficulty.h"
 #include "intdisplay.h"
 #include "mission.h"
@@ -132,7 +134,7 @@ static int32_t updateExtractedPower(STRUCTURE *psBuilding)
 {
 	RES_EXTRACTOR		*pResExtractor;
 	int32_t				pointsToAdd, extractedPoints;
-	int32_t				powmodifier;
+	int32_t                         powmodifier = NORMAL_POWER_MOD/10;
 
 	pResExtractor = (RES_EXTRACTOR *) psBuilding->pFunctionality;
 	extractedPoints = 0;
@@ -142,17 +144,14 @@ static int32_t updateExtractedPower(STRUCTURE *psBuilding)
 	{
 		int overflowDiff;
 		// Add modifier according to difficulty level
-		if (getDifficultyLevel() == DL_EASY)
-		{
-			powmodifier = EASY_POWER_MOD/10;
-		}
-		else if (getDifficultyLevel() == DL_HARD)
+		if (!NetPlay.bComms)             // ignore multiplayer games
 		{
-			powmodifier = HARD_POWER_MOD/10;
-		}
-		else
-		{
-			powmodifier = NORMAL_POWER_MOD/10;
+			switch (getDifficultyLevel())
+			{
+				case DL_EASY: powmodifier = EASY_POWER_MOD/10; break;
+				case DL_HARD: powmodifier = HARD_POWER_MOD/10; break;
+				default: break;
+			}
 		}
 		// if the extractor hasn't been updated recently, now would be a good time.
 		if (pResExtractor->timeLastUpdated < 20 && gameTime >= 20)