AP_Scripting: Cleanups to remove false posive warnings

libraries/AP_Scripting/lua/src/lua.c

@@ -1,3 +1,4 @@
+#if 0
 /*
 ** $Id: lua.c,v 1.230.1.1 2017/04/19 17:29:57 roberto Exp $
 ** Lua stand-alone interpreter
@@ -610,3 +611,4 @@ int main (int argc, char **argv) {
   return (result && status == LUA_OK) ? EXIT_SUCCESS : EXIT_FAILURE;
 }
 
+#endif

libraries/AP_Scripting/lua_repl.cpp

@@ -98,7 +98,6 @@ int lua_scripts::incomplete(lua_State *L, int status) {
 */
 int lua_scripts::pushline(lua_State *L, int firstline) {
     char buffer[LUA_MAXINPUT + 1] = {};
-    ssize_t read_bytes;
     size_t l = 0;
 
     // send prompt to the user
@@ -109,15 +108,12 @@ int lua_scripts::pushline(lua_State *L, int firstline) {
         int input_fd = AP::FS().open(REPL_IN, O_RDONLY);
         if (input_fd != -1) {
             AP::FS().lseek(input_fd, terminal.input_offset, SEEK_SET);
-            read_bytes = AP::FS().read(input_fd, buffer, ARRAY_SIZE(buffer) - 1);
+            ssize_t read_bytes = AP::FS().read(input_fd, buffer, ARRAY_SIZE(buffer) - 1);
             AP::FS().close(input_fd);
             if (read_bytes > 0) {
                 // locate the first newline
                 char * newline_chr = strchr(buffer, '\n');
-                if (newline_chr == NULL) {
-                    // we don't have something that looks like a newline, just keep reading till it's longer
-                    read_bytes = 0;
-                } else {
+                if (newline_chr != NULL) {
                     newline_chr[0] = '\0';
                     // only advance to the newline
                     l = strlen(buffer);

libraries/AP_Scripting/lua_scripts.cpp

@@ -374,7 +374,9 @@ void lua_scripts::run(void) {
     load_all_scripts_in_dir(L, SCRIPTING_DIRECTORY);
     load_all_scripts_in_dir(L, "@ROMFS/scripts");
 
+#ifndef __clang_analyzer__
     succeeded_initial_load = true;
+#endif // __clang_analyzer__
 
     while (AP_Scripting::get_singleton()->enabled()) {
         // handle terminal data if we have any