main: remove whitespace between if and left parenthesis

src/main.c

 int main(int argc, char **argv)
 {
     light_context_t *light_ctx = light_initialize(argc, argv);
-    if (light_ctx == NULL) {
+    if(light_ctx == NULL) {
         LIGHT_ERR("Initialization failed");
         return LIGHT_RETURNVAL_INITFAIL;
     }
 
-    if (!light_execute(light_ctx)) {
+    if(!light_execute(light_ctx)) {
         LIGHT_ERR("Execution failed");
         light_free(light_ctx);
         return LIGHT_RETURNVAL_EXECFAIL;