fix #4907:

integer SIGFPE in AAI

AI/Skirmish/AAI/AAIMap.cpp

@@ -1991,7 +1991,7 @@ void AAIMap::SearchMetalSpots()
 	}
 	for (int i = 0; i != TotalCells; i++) // this will get the total metal a mex placed at each spot would make
 	{
-		MexArrayB[i] = TempAverage[i] * 255 / MaxMetal;  //scale the metal so any map will have values 0-255, no matter how much metal it has
+		MexArrayB[i] = SafeDivide(TempAverage[i] * 255,  MaxMetal);  //scale the metal so any map will have values 0-255, no matter how much metal it has
 	}
 
 
@@ -2080,7 +2080,7 @@ void AAIMap::SearchMetalSpots()
 									}
 								}
 							}
-							MexArrayB[y * MetalMapWidth + x] = TotalMetal * 255 / MaxMetal;; //set that spots metal amount
+							MexArrayB[y * MetalMapWidth + x] = SafeDivide(TotalMetal * 255, MaxMetal); //set that spots metal amount
 						}
 					}
 				}