Indicate bitness in stackstrace and about dialog. Closes #6172.

src/app/stacktrace_win_dlg.h

@@ -60,7 +60,11 @@ public:
             "</p></font>"
             "<br/><hr><br/>"
             "<p align=center><font size=4>"
-            "qBittorrent version: " QBT_VERSION "<br/>"
+#if defined(__x86_64__) || defined(_M_X64)
+            "qBittorrent version: " QBT_VERSION " (64-bit)<br/>"
+#else
+            "qBittorrent version: " QBT_VERSION " (32-bit)<br/>"
+#endif
             "Libtorrent version: %1<br/>"
             "Qt version: " QT_VERSION_STR "<br/>"
             "Boost version: %2<br/>"

src/gui/about_imp.h

@@ -47,7 +47,11 @@ public:
         setAttribute(Qt::WA_DeleteOnClose);
 
         // Title
-        lb_name->setText("<b><h2>qBittorrent " QBT_VERSION "</h2></b>");
+#if defined(__x86_64__) || defined(_M_X64)
+        lb_name->setText("<b><h2>qBittorrent " QBT_VERSION " (64-bit)</h2></b>");
+#else
+        lb_name->setText("<b><h2>qBittorrent " QBT_VERSION " (32-bit)</h2></b>");
+#endif
 
         // About
         QString aboutText = QString(