compiler warning (signed/unsigned comparison)

CMakeLists.txt

@@ -56,9 +56,9 @@ ENDIF()
 SET(CMAKE_BUILD_TYPE "RelWithDebInfo" CACHE STRING
    "Choose the type of build, options are: None(CMAKE_CXX_FLAGS or CMAKE_C_FLAGS used) Debug Release RelWithDebInfo MinSizeRel")
 
-# MAX_INDEXES - Set the maximum number of indexes per table, default 64U
+# MAX_INDEXES - Set the maximum number of indexes per table, default 64
 IF (NOT MAX_INDEXES)
-  SET(MAX_INDEXES 64U)
+  SET(MAX_INDEXES 64)
 ENDIF(NOT MAX_INDEXES)
 
 IF (${MAX_INDEXES} GREATER 128)