hun#1999737 add some malloc checks

ChangeLog

@@ -1,5 +1,6 @@
 2010-03-04 Caolán McNamara <cmc at OOo>:
-	- hun#1724558 tidy substring.c a little
+	* hun#1724558 tidy substring.c a little
+	* hun#1999737 add some malloc checks
 
 2010-02-23 László Németh <nemeth at OOo>:
 	* hyphen.c: fix lefthyphenmin calculation for UTF-8 encoded input

csutil.c

@@ -20,18 +20,20 @@ char * mystrsep(char ** stringp, const char delim)
        *stringp = dp+1;
        nc = (int)((unsigned long)dp - (unsigned long)mp); 
        rv = (char *) malloc(nc+1);
+       if (rv) {
          memcpy(rv,mp,nc);
          *(rv+nc) = '\0';
-        return rv;
+       }
      } else {
        rv = (char *) malloc(n+1);
+       if (rv) {
          memcpy(rv, mp, n);
          *(rv+n) = '\0';
          *stringp = mp + n;
+       }
+     }
+  }
   return rv;
-     }
-  }
-  return NULL;
 }