Fix uninitialized event member access in ManyMouse (CWE-457)

In pump_events, the event struct members are used initialized in
three places:

1. Line 479, the event struct is passed into queue_event() which
   accesses the event's minval member, but it hasn't been written to
   at this point.

2. Line 488, the event struct is passed into queue_event() which
   accesses the event's minval member, but it hasn't been written to
   at this point.

3. Line 505, the event struct is passed into queue_event() which
   accesses the event's item member, but it hasn't been written to at
   this point.

1 files changed, 11 insertions, 2 deletions

diff --git a/src/libs/manymouse/x11_xinput2.c b/src/libs/manymouse/x11_xinput2.c
index 3593443fc..d85decef5 100644
--- a/src/libs/manymouse/x11_xinput2.c
+++ b/src/libs/manymouse/x11_xinput2.c
@@ -4,7 +4,9 @@
  * Please see the file LICENSE.txt in the source's root directory.
  *
  *  This file written by Ryan C. Gordon.
- *  Altered to silence compiler warnings by Roman Standzikowski.
+ *  Altered to:
+ *   - silence compiler warnings, by Roman Standzikowski.
+ *   - fix uninitialized event member access, by kcgen.
  */
 
 #include "manymouse.h"
@@ -397,7 +399,14 @@ static inline int map_xi2_button(const int button)
 
 static void pump_events(void)
 {
-    ManyMouseEvent event;
+    ManyMouseEvent event = {
+        .type = 0,
+        .device = 0,
+        .item = 0,
+        .value = 0,
+        .minval = 0,
+        .maxval = 0
+    };
     const int opcode = xi2_opcode;
     const XIRawEvent *rawev = NULL;
     const XIHierarchyEvent *hierev = NULL;