Add: [GS] Allow to set max loan for each company separately (#11224)

src/saveload/afterload.cpp

@@ -3280,6 +3280,12 @@ bool AfterLoadGame()
 		}
 	}
 
+	if (IsSavegameVersionBefore(SLV_MAX_LOAN_FOR_COMPANY)) {
+		for (Company *c : Company::Iterate()) {
+			c->max_loan = COMPANY_MAX_LOAN_DEFAULT;
+		}
+	}
+
 	for (Company *c : Company::Iterate()) {
 		UpdateCompanyLiveries(c);
 	}