fix 2 clang warnings

Author: zdenop

CMakeLists.txt

@@ -71,10 +71,10 @@ endif()
 if (WIN32)
     if (MSVC)
         add_definitions(-D_CRT_SECURE_NO_WARNINGS)
-        add_definitions(-DNOMINMAX)
         if (CLANG)
             set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Xclang -fopenmp /utf-8")
         else()
+            add_definitions(-DNOMINMAX)
             set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /MP /openmp /utf-8")
         endif()
     endif()

src/api/baseapi.cpp

@@ -1988,7 +1988,7 @@ bool TessBaseAPI::Threshold(Pix** pix) {
     pixDestroy(pix);
   // Zero resolution messes up the algorithms, so make sure it is credible.
   int user_dpi = 0;
-  bool a = GetIntVariable("user_defined_dpi", &user_dpi);
+  GetIntVariable("user_defined_dpi", &user_dpi);
   int y_res = thresholder_->GetScaledYResolution();
   if (user_dpi && (user_dpi < kMinCredibleResolution ||
       user_dpi > kMaxCredibleResolution)) {