fix deref before null check

src/switch_curl.c

@@ -81,9 +81,10 @@ SWITCH_DECLARE(switch_status_t) switch_curl_process_form_post_params(switch_even
 
 		if (!strncasecmp(hp->name, "attach_file:", 12)) {
 			char *pname = strdup(hp->name + 12);
-			char *fname = strchr(pname, ':');
 			
-			if (fname && pname) {
+			if (pname) {
+				char *fname = strchr(pname, ':');
+				if (fname) {
 					*fname++ = '\0';
 
 					curl_formadd(&formpost,
@@ -93,9 +94,8 @@ SWITCH_DECLARE(switch_status_t) switch_curl_process_form_post_params(switch_even
 								 CURLFORM_FILE, hp->value,
 								 CURLFORM_END);
 				}
-
 				free(pname);
-
+			}
 		} else {
 			curl_formadd(&formpost,
 						 &lastptr,