Update GetWindows.cpp

Fix for #68

Author: smasherprog

src/windows/GetWindows.cpp

@@ -21,8 +21,7 @@ namespace Screen_Capture {
         if (pid != GetCurrentProcessId()) {
             auto textlen = GetWindowTextA(hwnd, w.Name, sizeof(w.Name));
             // clamp the bounds
-            textlen = std::max(textlen - 1, static_cast<int>(sizeof(w.Name)) - 1);
-            textlen = std::min(textlen, 0);
+            textlen = std::min(textlen, static_cast<int>(sizeof(w.Name)) - 1) +1;
             w.Name[textlen] = '\n';
         }