Fix overriding of print to be compatible to stdlib again

Author: FlorianLoch

Sha/sha1.cpp

@@ -72,9 +72,10 @@ void Sha1Class::addUncounted(uint8_t data) {
   }
 }
 
-void Sha1Class::write(uint8_t data) {
+size_t Sha1Class::write(uint8_t data) {
   ++byteCount;
   addUncounted(data);
+  return 1;
 }
 
 void Sha1Class::pad() {

Sha/sha1.h

@@ -23,7 +23,7 @@ class Sha1Class : public Print
     void initHmac(const uint8_t* secret, int secretLength);
     uint8_t* result(void);
     uint8_t* resultHmac(void);
-    virtual void write(uint8_t);
+    virtual size_t write(uint8_t);
     using Print::write;
   private:
     void pad();