Eliminate some more warnings and hide less warnings in VS

src/common/server.c

@@ -1379,15 +1379,21 @@ base64_encode (char *to, char *from, unsigned int len)
 	}
 	if (len)
 	{
-		char three[3]={0,0,0};
-		int i=0;
-		for (i=0;i<len;i++)
+		char three[3] = {0,0,0};
+		unsigned int i;
+		for (i = 0; i < len; i++)
+		{
 			three[i] = *from++;
+		}
 		three_to_four (three, to);
 		if (len == 1)
+		{
 			to[2] = to[3] = '=';
+		}
 		else if (len == 2)
+		{
 			to[3] = '=';
+		}
 		to += 4;
 	};
 	to[0] = 0;