Fix test script syntax

Author: Blake-Madden

tests/CMakeLists.txt

@@ -103,6 +103,7 @@ if(TE_BUILD_TEST_RUNNER)
     if (CMAKE_CXX_COMPILER_ID MATCHES "Clang|GNU")
         set_source_files_properties(
             tetests.cpp PROPERTIES COMPILE_FLAGS "-Wno-parentheses -Wno-unused-but-set-variable")
+    endif()
     if (CMAKE_CXX_COMPILER_ID MATCHES "Clang|GNU")
         set_source_files_properties(
             tinyexpr.cpp PROPERTIES COMPILE_FLAGS "-Werror=unused-function")