Add OutOfMemory log helper

Add a special LOG_OOM() function to log all OutOfMemory errors (i.e.
allocations returning NULL).

app/src/sys/win/file.c

@@ -26,7 +26,7 @@ bool
 sc_file_is_regular(const char *path) {
     wchar_t *wide_path = sc_str_to_wchars(path);
     if (!wide_path) {
-        LOGC("Could not allocate wide char string");
+        LOG_OOM();
         return false;
     }
 

app/src/sys/win/process.c

@@ -100,6 +100,7 @@ sc_process_execute_p(const char *const argv[], HANDLE *handle,
 
         lpAttributeList = malloc(size);
         if (!lpAttributeList) {
+            LOG_OOM();
             goto error_close_stderr;
         }
 
@@ -133,13 +134,14 @@ sc_process_execute_p(const char *const argv[], HANDLE *handle,
 
     char *cmd = malloc(CMD_MAX_LEN);
     if (!cmd || !build_cmd(cmd, CMD_MAX_LEN, argv)) {
+        LOG_OOM();
         goto error_free_attribute_list;
     }
 
     wchar_t *wide = sc_str_to_wchars(cmd);
     free(cmd);
     if (!wide) {
-        LOGC("Could not allocate wide char string");
+        LOG_OOM();
         goto error_free_attribute_list;
     }