Introduce and use small[u]int type. Changes in size:

Introduce and use small[u]int type. Changes in size:

-     79              0      28     107      6b libc/inet/rpc/create_xid.o
+     76              0      25     101      65 libc/inet/rpc/create_xid.o
-    126              0       4     130      82 libc/misc/assert/__assert.o
+    123              0       1     124      7c libc/misc/assert/__assert.o
-    648              4      24     676     2a4 libc/misc/internals/__uClibc_main.o
+    645              4      21     670     29e libc/misc/internals/__uClibc_main.o
-    230              0       4     234      ea libc/stdlib/abort.o
+    216              0       1     217      d9 libc/stdlib/abort.o
-    129              0       4     133      85 libc/termios/tcgetsid.o
+    126              0       1     127      7f libc/termios/tcgetsid.o