diff -rup gli-0.8.2.0.orig/manual.md gli-0.8.2.0/manual.md
--- gli-0.8.2.0.orig/manual.md	2016-11-12 23:36:01.000000000 +0100
+++ gli-0.8.2.0/manual.md	2021-06-02 11:37:08.815699456 +0200
@@ -135,7 +135,7 @@ bool convert_rgb32f_rgb9e5(const char* F
 {
 	if(FilenameDst == NULL)
 		return false;
-	if(std::strstr(FilenameDst, ".dds") > 0 || std::strstr(FilenameDst, ".ktx") > 0)
+	if(std::strstr(FilenameDst, ".dds") != nullptr || std::strstr(FilenameDst, ".ktx") != nullptr)
 		return false;
 
 	gli::texture2d TextureSource(gli::load(FilenameSrc));
diff -rup gli-0.8.2.0.orig/test/core/core_convert.cpp gli-0.8.2.0/test/core/core_convert.cpp
--- gli-0.8.2.0.orig/test/core/core_convert.cpp	2016-11-12 23:36:01.000000000 +0100
+++ gli-0.8.2.0/test/core/core_convert.cpp	2021-06-02 11:37:18.087762356 +0200
@@ -32,7 +32,7 @@ bool convert_rgb32f_rgb9e5(const char* F
 {
 	if(FilenameDst == NULL)
 		return false;
-	if(std::strstr(FilenameDst, ".dds") > 0 || std::strstr(FilenameDst, ".ktx") > 0)
+	if(std::strstr(FilenameDst, ".dds") != nullptr || std::strstr(FilenameDst, ".ktx") != nullptr)
 		return false;
 
 	gli::texture2d TextureSource(gli::load(FilenameSrc));