platforms/nuttx: init.cmake skip config lines with empty values

platforms/nuttx/cmake/init.cmake

@@ -153,10 +153,11 @@ foreach(NameAndValue ${ConfigContents})
 	# Find variable name
 	string(REGEX MATCH "^CONFIG[^=]+" Name ${NameAndValue})
 
-	if (Name)
+	if(Name)
 		# Find the value
 		string(REPLACE "${Name}=" "" Value ${NameAndValue})
 
+		if(Value)
 			# remove extra quotes
 			string(REPLACE "\"" "" Value ${Value})
 
@@ -164,4 +165,5 @@ foreach(NameAndValue ${ConfigContents})
 			#message(STATUS "${Name} ${Value}")
 			set(${Name} ${Value} CACHE INTERNAL "NUTTX DEFCONFIG: ${Name}" FORCE)
 		endif()
+	endif()
 endforeach()