Removed unused flags from String (free 1 byte of SRAM)

Author: cmaglie

hardware/arduino/avr/cores/arduino/WString.cpp

@@ -134,7 +134,6 @@ inline void String::init(void)
 	buffer = NULL;
 	capacity = 0;
 	len = 0;
-	flags = 0;
 }
 
 void String::invalidate(void)

hardware/arduino/avr/cores/arduino/WString.h

@@ -191,7 +191,6 @@ class String
 	char *buffer;	        // the actual char array
 	unsigned int capacity;  // the array length minus one (for the '\0')
 	unsigned int len;       // the String length (not counting the '\0')
-	unsigned char flags;    // unused, for future features
 protected:
 	void init(void);
 	void invalidate(void);