Fix bug in fromBlend selection

Author: fred3m

python/lsst/meas/algorithms/setPrimaryFlags.py

@@ -303,9 +303,9 @@ def getDeblendPrimaryFlags(sources):
         # children).
         isLeaf = nChild == 0
         isChild = depth > 0
-        isSibling = parentNPeaks > 1
+        isSibling = (parentNPeaks > 1)
         isDeblendedModelSource = isLeaf & isChild
-        fromBlend = isDeblendedModelSource & isSibling
+        fromBlend = isDeblendedModelSource & (isSibling | (depth > 1))
         isIsolatedParent = (depth == 0) & (nPeaks == 1)
         isIsolated = isIsolatedParent | ((depth == 1) & ~isSibling)
         isDeblendedSource = fromBlend | isIsolatedParent