MSVC: Fix compiler warnings

* avoid redefines in Assembly
* explicit cast from size_t to int
* remove unused variables
* avoid implicit cast from double to float
* in test cases replace EXPECT_FLOAT_EQ with EXPECT_DOUBLE_EQ or EXPECT_NEAR when doubles are used

src/Mod/Assembly/Gui/CMakeLists.txt

@@ -72,6 +72,11 @@ SET(AssemblyGuiIcon_SVG
 )
 
 add_library(AssemblyGui SHARED ${AssemblyGui_SRCS} ${AssemblyGuiIcon_SVG})
+
+if(WIN32)
+    target_compile_definitions(AssemblyGui PRIVATE _USE_MATH_DEFINES)
+endif(WIN32)
+
 target_link_libraries(AssemblyGui ${AssemblyGui_LIBS})
 if (FREECAD_WARN_ERROR)
     target_compile_warn_error(AssemblyGui)

src/Mod/Assembly/Gui/PreCompiled.h

@@ -21,8 +21,8 @@
  *                                                                          *
  ***************************************************************************/
 
-#ifndef POINTSGUI_PRECOMPILED_H
-#define POINTSGUI_PRECOMPILED_H
+#ifndef ASSEMBLYGUI_PRECOMPILED_H
+#define ASSEMBLYGUI_PRECOMPILED_H
 
 #include <FCConfig.h>
 
@@ -30,6 +30,7 @@
 
 // STL
 #include <algorithm>
+#include <cmath>
 #include <limits>
 #include <memory>
 
@@ -53,4 +54,4 @@
 
 #endif  //_PreComp_
 
-#endif  // POINTSGUI_PRECOMPILED_H
+#endif  // ASSEMBLYGUI_PRECOMPILED_H