Removed some unnecessary casts, used C++-style casts over C-style casts, fixed a few warnings (one possibly fatal one).

git-svn-id: http://anope.svn.sourceforge.net/svnroot/anope/trunk@2655 5417fbe8-f217-4b02-8779-1006273d7864

src/process.c

@@ -262,7 +262,7 @@ int split_buf(char *buf, const char ***argv, int colon_special)
 		}
 		if (*buf == ':') {
 			(*argv)[argc++] = buf + 1;
-			buf = (char *)""; // XXX: unsafe cast.
+			buf = const_cast<char *>(""); // XXX: unsafe cast.
 		} else {
 			s = strpbrk(buf, " ");
 			if (s) {