some code cleanup in misc.cpp and fixed a small typo

include/users.h

@@ -176,7 +176,7 @@ class CoreExport User : public Extensible
 	void Logout();
 
 	/** Get the account the user is logged in using
-	 * @reurn The account or NULL
+	 * @return The account or NULL
 	 */
 	virtual NickCore *Account();
 	virtual const NickCore *Account() const;

src/misc.cpp

@@ -1308,9 +1308,9 @@ Anope::string Anope::Hex(const Anope::string &data)
 {
 	const char hextable[] = "0123456789abcdef";
 
-	int l = data.length();
+	size_t l = data.length();
 	Anope::string rv;
-	for(int i=0; i < l; i++)
+	for (size_t i = 0; i < l; ++i)
 	{
 		unsigned char c = data[i];
 		rv += hextable[c >> 4];