Fixing findUntil() problem with repeated initial characters. (Jeffery.zksun)

http://code.google.com/p/arduino/issues/detail?id=768

cores/arduino/Stream.cpp

@@ -103,15 +103,17 @@ bool Stream::findUntil(char *target, size_t targetLen, char *terminator, size_t
   if( *target == 0)
     return true;   // return true if target is a null string
   while( (c = timedRead()) > 0){
+    
+    if(c != target[index])
+      index = 0; // reset index if any char does not match
+    
     if( c == target[index]){
       //////Serial.print("found "); Serial.write(c); Serial.print("index now"); Serial.println(index+1);
       if(++index >= targetLen){ // return true if all chars in the target match
         return true;
       }
     }
-    else{
-      index = 0;  // reset index if any char does not match
-    }
+    
     if(termLen > 0 && c == terminator[termIndex]){
       if(++termIndex >= termLen)
         return false;       // return false if terminate string found before target string