Add error checking of strdup.

git-svn-id: svn+ssh://svn.berlios.de/svnroot/repos/libssh/trunk@343 7dcaeef0-15fb-0310-b436-a5af3365683c

libssh/dh.c

@@ -591,6 +591,9 @@ static int match(char *group,char *object){
     char *ptr,*saved;
     char *end;
     ptr=strdup(group);
+    if (ptr == NULL) {
+      return -1;
+    }
     saved=ptr;
     while(1){
         end=strchr(ptr,',');