make regex_old.c, ruserpass.c use __uc_malloc,

replace "buf = malloc(BUFSIZ); if (!buf) abort();" by __uc_malloc
elsewhere.

With last 7 patches together uclibc has 3k of static data total
with fairly big .config and with 2k being used for 2 x BUFSIZ stdio buffer:
   text    data     bss     dec     hex filename
    114     132    2048    2294     8f6 _stdio.o (ex lib/libc.a)
total data 593
total bss  3062

1 files changed, 2 insertions, 3 deletions

diff --git a/libc/inet/getproto.c b/libc/inet/getproto.c
index c1292ed30..6367ccfce 100644
--- a/libc/inet/getproto.c
+++ b/libc/inet/getproto.c
@@ -59,6 +59,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <malloc.h>
 #include <errno.h>
 
 libc_hidden_proto(fopen)
@@ -86,9 +87,7 @@ static int proto_stayopen;
 static void __initbuf(void)
 {
     if (!static_aliases) {
-	static_aliases = malloc(SBUFSIZE);
-	if (!static_aliases)
-	    abort();
+	static_aliases = __uc_malloc(SBUFSIZE);
     }
 }