Fix warnings

Author: darbyjohnston

bin/toucan-render/main.cpp

@@ -174,8 +174,7 @@ int main(int argc, char** argv)
                 {
                     for (const auto& line : lines)
                     {
-                        fprintf(f, line.c_str());
-                        fprintf(f, "\n");
+                        fprintf(f, "%s\n", line.c_str());
                     }
                     fclose(f);
                 }

lib/toucan/ImageGraph.cpp

@@ -158,7 +158,7 @@ namespace toucan
         const auto& children = track->children();
         for (size_t i = 0; i < children.size(); ++i)
         {
-            if (item = OTIO_NS::dynamic_retainer_cast<OTIO_NS::Item>(children[i]))
+            if ((item = OTIO_NS::dynamic_retainer_cast<OTIO_NS::Item>(children[i])))
             {
                 const auto trimmedRangeInParent = item->trimmed_range_in_parent();
                 if (trimmedRangeInParent.has_value() && trimmedRangeInParent.value().contains(time))