fix: crash on app_event_run_engine on scan with SID_LOCATION_METHOD_WIFI

By configuring `sid_location_config` with
`.sid_location_type_mask = SID_LOCATION_METHOD_WIFI` the
`mw_wifi_scan_service_on_update` crashes with the following stack trace:

[00:00:02.012,512] <err> os: ***** BUS FAULT *****
[00:00:02.012,542] <err> os:   Precise data bus error
[00:00:02.012,542] <err> os:   BFAR Address: 0xfab24321
[00:00:02.012,542] <err> os:   Imprecise data bus error
[00:00:02.012,573] <err> os: r0/a1:  0x00000000  r1/a2:  0xfab242cd  r2/a3:  0x00000000
[00:00:02.012,603] <err> os: r3/a4:  0x0004f93d r12/ip:  0x00000002 r14/lr:  0x00034235
[00:00:02.012,603] <err> os:  xpsr:  0x61000021
[00:00:02.012,634] <err> os: s[ 0]:  0x00000000  s[ 1]:  0x00000000  s[ 2]:  0x00000000  s[ 3]:  0x0004f93d
[00:00:02.012,634] <err> os: s[ 4]:  0x20012808  s[ 5]:  0x200127f8  s[ 6]:  0x20022e88  s[ 7]:  0x00034235
[00:00:02.012,664] <err> os: s[ 8]:  0x00000000  s[ 9]:  0x20022e88  s[10]:  0x200024a0  s[11]:  0x00000000
[00:00:02.012,664] <err> os: s[12]:  0x00000000  s[13]:  0x00000000  s[14]:  0x00000000  s[15]:  0x00083d6f
[00:00:02.012,695] <err> os: fpscr:  0x00000002
[00:00:02.012,695] <err> os: r4/v1:  0xfab24285  r5/v2:  0x00000000  r6/v3:  0x00000000
[00:00:02.012,725] <err> os: r7/v4:  0x20000bb4  r8/v5:  0x20012800  r9/v6:  0x00000000
[00:00:02.012,725] <err> os: r10/v7: 0x00000000  r11/v8: 0x00000003    psp:  0x2001d1d8
[00:00:02.012,725] <err> os: EXC_RETURN: 0xfffffff1
[00:00:02.012,756] <err> os: Faulting instruction address (r15/pc): 0x0004f94c
[00:00:02.012,786] <err> os: >>> ZEPHYR FATAL ERROR 26: Unknown error on CPU 0
[00:00:02.012,786] <err> os: Fault during interrupt handling
[00:00:02.012,817] <err> os: Current thread: 0x2000cb80 (logging)
[00:00:02.187,377] <err> os: Halting system

This PR addresses this issue by correctly handling the type of event in
`app_event_run_engine`

Signed-off-by: Martin Moya <moyamartin1@gmail.com>

Author: moyamartin

subsys/semtech/lr1110_location/sid_pal_gnss_wifi_impl.c

@@ -89,7 +89,13 @@ static sid_error_t schedule_lbm_timer(uint32_t delay_ms) {
 }
 
 void app_event_run_engine() {
-    location_state.wifi_cfg.on_wifi_event(location_state.gnss_cfg.ctx, EVENT_TYPE_LBM, 0);
+    if(location_state.wifi_cfg.on_wifi_event) {
+        location_state.wifi_cfg.on_wifi_event(location_state.wifi_cfg.ctx, EVENT_TYPE_LBM, 0);
+    } else if(location_state.gnss_cfg.on_gnss_event) {
+        location_state.gnss_cfg.on_gnss_event(location_state.gnss_cfg.ctx, EVENT_TYPE_LBM, 0);
+    } else {
+        SID_PAL_LOG_WARNING("Location event callback not set");
+    }
 }
 
 sid_error_t sid_pal_common_process_event() {