[fixes] missing = in the energy costs for exercise

locations/exercise.qsrc

@@ -500,7 +500,7 @@ if $ARGS[0] = 'tier1':
 
 	gs 'sweat', 'add', 3
 	fat -= 1
-	pcs_energy - 3
+	pcs_energy -= 3
 	pcs_mood += 3
 	if $ARGS[3] = '':
 		dynamic '<<$ARGS[2]>> += 1'
@@ -537,7 +537,7 @@ if $ARGS[0] = 'tier2':
 
 	gs 'sweat', 'add', 10
 	fat -= 2
-	pcs_energy - 6
+	pcs_energy -= 6
 	pcs_mood += 5
 	if $ARGS[3] = '':
 		dynamic '<<$ARGS[2]>> += rand(2,3)'
@@ -573,7 +573,7 @@ if $ARGS[0] = 'tier3':
 
 	gs 'sweat', 'add', 15
 	fat -= 3
-	pcs_energy - 9
+	pcs_energy -= 9
 	pcs_mood += 5
 	if $ARGS[3] = '':
 		dynamic '<<$ARGS[2]>> += rand(3,5)'
@@ -609,7 +609,7 @@ if $ARGS[0] = 'tier4':
 
 	gs 'sweat', 'add', 25
 	fat -= 4
-	pcs_energy - 12
+	pcs_energy -= 12
 	pcs_mood += 5
 	if $ARGS[3] = '':
 		dynamic '<<$ARGS[2]>> += rand(7,10)'