Add const-qualifier for isManagingContext.
diff --git a/lib/bcc/ContextManager.cpp b/lib/bcc/ContextManager.cpp
index 16fbcf1..0fe9f78 100644
--- a/lib/bcc/ContextManager.cpp
+++ b/lib/bcc/ContextManager.cpp
@@ -168,7 +168,7 @@
 }
 
 
-bool ContextManager::isManagingContext(char *addr) {
+bool ContextManager::isManagingContext(char *addr) const {
   ssize_t slot = getSlotIndexFromAddress(addr);
 
   if (slot < 0) {