Fixing name of parameter of String::concat(unsigned char) to be consistent between header and implementation.

(Also helps understanding what that function is supposed to do.)

Author: aentinger

Diff for: api/String.h

@@ -107,7 +107,7 @@ class String
 	unsigned char concat(const String &str);
 	unsigned char concat(const char *cstr);
 	unsigned char concat(char c);
-	unsigned char concat(unsigned char c);
+	unsigned char concat(unsigned char num);
 	unsigned char concat(int num);
 	unsigned char concat(unsigned int num);
 	unsigned char concat(long num);