Index: _hotshot.c
===================================================================
--- _hotshot.c	(revision 51278)
+++ _hotshot.c	(working copy)
@@ -308,7 +308,12 @@
     if ((err = unpack_packed_int(self, &len, 0)))
         return err;
 
-    buf = malloc(len);
+    buf = (char *)malloc(len);
+    if (!buf) {
+	PyErr_NoMemory();
+	return ERR_EXCEPTION;
+    }
+
     for (i=0; i < len; i++) {
         ch = fgetc(self->logfp);
 	buf[i] = ch;
@@ -1398,11 +1403,11 @@
     char *buffer;
     int i = 0;
 
-    while (*rev && !isdigit((int)*rev))
+    while (*rev && !isdigit(Py_CHARMASK(*rev)))
         ++rev;
     while (rev[i] != ' ' && rev[i] != '\0')
         ++i;
-    buffer = malloc(i + 1);
+    buffer = (char *)malloc(i + 1);
     if (buffer != NULL) {
         memmove(buffer, rev, i);
         buffer[i] = '\0';