Better VariableReactorBuild explosion check

core/src/mindustry/world/blocks/power/PowerGenerator.java

@@ -110,8 +110,12 @@ public class PowerGenerator extends PowerDistributor{
             }
         }
 
+        public boolean shouldExplode(){
+            return warmup() >= explosionMinWarmup;
+        }
+
         public void createExplosion(){
-            if(warmup() >= explosionMinWarmup){
+            if(shouldExplode()){
                 if(explosionDamage > 0){
                     Damage.damage(x, y, explosionRadius * tilesize, explosionDamage);
                 }

core/src/mindustry/world/blocks/power/VariableReactor.java

@@ -92,6 +92,11 @@ public class VariableReactor extends PowerGenerator{
             }
         }
 
+        @Override
+        public boolean shouldExplode(){
+            return heat > 0f;
+        }
+
         @Override
         public void draw(){
             super.draw();