FS-11785 [core] fix scan-build issues

src/switch.c

@@ -1240,7 +1240,7 @@ int main(int argc, char *argv[])
 		int j = 0;
 
 		switch_sleep(1000000);
-		if (!argv || execv(argv[0], argv) == -1) {
+		if (!argv || !argv[0] || execv(argv[0], argv) == -1) {
 			fprintf(stderr, "Restart Failed [%s] resorting to plan b\n", strerror(errno));
 			for (j = 0; j < argc; j++) {
 				switch_snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%s ", argv[j]);

src/switch_channel.c

@@ -3679,6 +3679,7 @@ static void do_execute_on(switch_channel_t *channel, const char *variable)
 		}
 	}
 
+	switch_assert(app != NULL);
 	if (!strncasecmp(app, "perl", 4)) {
 		bg++;
 	}

src/switch_core.c

@@ -270,19 +270,7 @@ SWITCH_DECLARE(void) switch_core_screen_size(int *x, int *y)
 
 SWITCH_DECLARE(FILE *) switch_core_data_channel(switch_text_channel_t channel)
 {
-	FILE *handle = stdout;
-
-	switch (channel) {
-	case SWITCH_CHANNEL_ID_LOG:
-	case SWITCH_CHANNEL_ID_LOG_CLEAN:
-		handle = runtime.console;
-		break;
-	default:
-		handle = runtime.console;
-		break;
-	}
-
-	return handle;
+	return runtime.console;
 }
 
 
@@ -2880,7 +2868,7 @@ SWITCH_DECLARE(int32_t) switch_core_session_ctl(switch_session_ctl_t cmd, void *
 	case SCSC_DEBUG_LEVEL:
 		if (oldintval > -1) {
 			if (oldintval > 10)
-				newintval = 10;
+				oldintval = 10;
 			runtime.debug_level = oldintval;
 		}
 		newintval = runtime.debug_level;

src/switch_core_file.c

@@ -43,6 +43,8 @@ static switch_status_t get_file_size(switch_file_handle_t *fh, const char **stri
 	switch_file_t *newfile;
 	switch_size_t size = 0;
 
+	switch_assert(string);
+
 	status = switch_file_open(&newfile, fh->spool_path ? fh->spool_path : fh->file_path, SWITCH_FOPEN_READ, SWITCH_FPROT_OS_DEFAULT, fh->memory_pool);
 
 	if (status != SWITCH_STATUS_SUCCESS) {