Try to load disksys.rom from current rom directory

Author: pingflood

src/file.cpp

@@ -735,8 +735,11 @@ std::string FCEU_MakeFName(int type, int id1, const char *cd1)
 		case FCEUMKF_FDSROM:
 			if(odirs[FCEUIOD_FDSROM])
 				sprintf(ret,"%s" PSS "disksys.rom",odirs[FCEUIOD_FDSROM]);
-			else
-				sprintf(ret,"%s" PSS "disksys.rom",BaseDirectory.c_str());
+			else {
+				sprintf(ret,"%s" PSS "disksys.rom",FileBaseDirectory);
+				if (stat(ret,&tmpstat) != 0)
+					sprintf(ret,"%s" PSS "disksys.rom",BaseDirectory.c_str());
+			}
 			break;
 		case FCEUMKF_PALETTE:sprintf(ret,"%s" PSS "%s.pal",BaseDirectory.c_str(),FileBase);break;
 		case FCEUMKF_MOVIEGLOB: