Updated Stream.cpp in SAM core to the latest version

hardware/arduino/sam/cores/arduino/Stream.cpp

@@ -254,22 +254,24 @@ String Stream::readStringUntil(char terminator)
 int Stream::findMulti( struct Stream::MultiTarget *targets, int tCount) {
   // any zero length target string automatically matches and would make
   // a mess of the rest of the algorithm.
-  for (struct MultiTarget *t = targets; t < targets+tCount; ++t)
+  for (struct MultiTarget *t = targets; t < targets+tCount; ++t) {
     if (t->len <= 0)
       return t - targets;
+  }
 
-  while(1) {
+  while (1) {
     int c = timedRead();
     if (c < 0)
       return -1;
 
     for (struct MultiTarget *t = targets; t < targets+tCount; ++t) {
       // the simple case is if we match, deal with that first.
-      if (c == t->str[t->index])
+      if (c == t->str[t->index]) {
         if (++t->index == t->len)
           return t - targets;
         else
           continue;
+      }
 
       // if not we need to walk back and see if we could have matched further
       // down the stream (ie '1112' doesn't match the first position in '11112'
@@ -293,16 +295,19 @@ int Stream::findMulti( struct Stream::MultiTarget *targets, int tCount) {
 
         // otherwise we need to check the rest of the found string
         int diff = origIndex - t->index;
-	int i;
-	for (i = 0; i < t->index; ++i)
+        size_t i;
+        for (i = 0; i < t->index; ++i) {
           if (t->str[i] != t->str[i + diff])
             break;
+        }
+
         // if we successfully got through the previous loop then our current
         // index is good.
         if (i == t->index) {
           t->index++;
           break;
         }
+
         // otherwise we just try the next index
       } while (t->index);
     }