Fix gcc warnings

gtsam/inference/MetisIndex-inl.h

@@ -42,7 +42,7 @@ void MetisIndex::augment(const FactorGraph<FACTOR>& factors)
   // First: Record a copy of each key inside the factorgraph and create a
   // key to integer mapping. This is referenced during the adjaceny step
   for (size_t i = 0; i < factors.size(); i++){
-    if (factors[i])
+    if (factors[i]) {
       BOOST_FOREACH(const Key& key, *factors[i]){
         keySet.insert(keySet.end(), key); // Keep a track of all unique keys
         if (intKeyBMap_.left.find(key) == intKeyBMap_.left.end()){
@@ -50,6 +50,7 @@ void MetisIndex::augment(const FactorGraph<FACTOR>& factors)
           keyCounter++;
         }
       }
+    }
   }
   
   // Create an adjacency mapping that stores the set of all adjacent keys for every key

gtsam/inference/Ordering.cpp

@@ -227,7 +227,7 @@ namespace gtsam {
     }
 
     result.resize(size);
-    for (size_t j = 0; j < size; ++j){
+    for (size_t j = 0; j < (size_t)size; ++j){
 	    // We have to add the minKey value back to obtain the original key in the Values
 	    result[j] = met.intToKey(perm[j]);
     }