Fix false positive cache check error on MinGW/GCC 10 builds

Due to incorrect default operator== on structs with C arrays.

See: #709
See: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94924

src/company_base.h

@@ -31,12 +31,12 @@ struct CompanyEconomyEntry {
 };
 
 struct CompanyInfrastructure {
-	uint32_t road[ROADTYPE_END]; ///< Count of company owned track bits for each road type.
+	std::array<uint32_t, ROADTYPE_END> road{}; ///< Count of company owned track bits for each road type.
-	uint32_t signal;             ///< Count of company owned signals.
+	uint32_t signal{};                         ///< Count of company owned signals.
-	uint32_t rail[RAILTYPE_END]; ///< Count of company owned track bits for each rail type.
+	std::array<uint32_t, RAILTYPE_END> rail{}; ///< Count of company owned track bits for each rail type.
-	uint32_t water;              ///< Count of company owned track bits for canals.
+	uint32_t water{};                          ///< Count of company owned track bits for canals.
-	uint32_t station;            ///< Count of company owned station tiles.
+	uint32_t station{};                        ///< Count of company owned station tiles.
-	uint32_t airport;            ///< Count of company owned airports.
+	uint32_t airport{};                        ///< Count of company owned airports.
 
 	/** Get total sum of all owned track bits. */
 	uint32_t GetRailTotal() const

src/company_gui.cpp

@@ -2456,7 +2456,7 @@ struct CompanyWindow : Window
 		int y = r.top;
 
 		uint rail_pieces = c->infrastructure.signal;
-		for (uint i = 0; i < lengthof(c->infrastructure.rail); i++) rail_pieces += c->infrastructure.rail[i];
+		for (uint32_t pieces : c->infrastructure.rail) rail_pieces += pieces;
 		if (rail_pieces != 0) {
 			SetDParam(0, rail_pieces);
 			DrawString(r.left, r.right, y, STR_COMPANY_VIEW_INFRASTRUCTURE_RAIL);
@@ -2464,7 +2464,7 @@ struct CompanyWindow : Window
 		}
 
 		uint road_pieces = 0;
-		for (uint i = 0; i < lengthof(c->infrastructure.road); i++) road_pieces += c->infrastructure.road[i];
+		for (uint32_t pieces : c->infrastructure.road) road_pieces += pieces;
 		if (road_pieces != 0) {
 			SetDParam(0, road_pieces);
 			DrawString(r.left, r.right, y, STR_COMPANY_VIEW_INFRASTRUCTURE_ROAD);

src/sl/company_sl.cpp

@@ -101,7 +101,7 @@ CompanyManagerFace ConvertFromOldCompanyManagerFace(uint32_t face)
 void AfterLoadCompanyStats()
 {
 	/* Reset infrastructure statistics to zero. */
-	for (Company *c : Company::Iterate()) MemSetT(&c->infrastructure, 0);
+	for (Company *c : Company::Iterate()) c->infrastructure = {};
 
 	/* Collect airport count. */
 	for (const Station *st : Station::Iterate()) {