Merge pull request #2279 from olliwr/mega

Fixed compile errors that occurred when FEATURE_SD is defined.

src/Command.ino

@@ -122,7 +122,7 @@ String doExecuteCommand(const char * cmd, struct EventStruct *event, const char*
     }
     case 's': {
 	  COMMAND_CASE("save"                   , Command_Settings_Save);              // Settings.h
-	#if FEATURE_SD
+	#ifdef FEATURE_SD
 	  COMMAND_CASE("sdcard"                 , Command_SD_LS);                      // SDCARDS.h
 	  COMMAND_CASE("sdremove"               , Command_SD_Remove);                  // SDCARDS.h
 	#endif
@@ -258,7 +258,7 @@ void printDirectory(File dir, int numTabs)
 			break;
 		}
 		for (uint8_t i = 0; i < numTabs; i++) {
-			serialPrint('\t');
+			serialPrint("\t");
 		}
 		serialPrint(entry.name());
 		if (entry.isDirectory()) {
@@ -267,7 +267,7 @@ void printDirectory(File dir, int numTabs)
 		} else {
 			// files have sizes, directories do not
 			serialPrint("\t\t");
-			serialPrintln(entry.size(), DEC);
+			serialPrintln(String(entry.size(), DEC));
 		}
 		entry.close();
 	}