Fix alignment issues in message sending/reading that would crash IRIX, thanks to Canavan for supplying a shell where I could fix this (#5077)

code/qcommon/q_shared.c

@@ -129,6 +129,24 @@ float	BigFloat (const float *l) {return _BigFloat(l);}
 float	LittleFloat (const float *l) {return _LittleFloat(l);}
 */
 
+void CopyShortSwap(void *dest, void *src)
+{
+	byte *to = dest, *from = src;
+
+	to[0] = from[1];
+	to[1] = from[0];
+}
+
+void CopyLongSwap(void *dest, void *src)
+{
+	byte *to = dest, *from = src;
+
+	to[0] = from[3];
+	to[1] = from[2];
+	to[2] = from[1];
+	to[3] = from[0];
+}
+
 short   ShortSwap (short l)
 {
 	byte    b1,b2;