explicit null checks are cool

src/wofi.c

@@ -414,13 +414,13 @@ static GtkWidget* create_label(char* mode, char* text, char* search_text, char*
 		if (fp_labeltext == NULL) {
 			fprintf(stderr, "error executing '%s'\n", cmd_labeltext);
 			exit(EXIT_FAILURE);
-		} else if (fgets(line, sizeof(line), fp_labeltext)) {
+		} else if (fgets(line, sizeof(line), fp_labeltext) != NULL) {
 			// lastly, read the output of said command, and put it into the text variable to be used for the label widgets
 			// consider using 'printf %.10s as your --pre-display-cmd to limit a string to a determined width. 10 here is an example
 			size += strlen(line+1); // we need place for the \0 of strcpy
 			text = (char *) realloc(text, size);
 			strcpy(text, line);
-			while (fgets(line, sizeof(line), fp_labeltext)) {
+			while (fgets(line, sizeof(line), fp_labeltext) != NULL) {
 				size += strlen(line);
 				text = (char *) realloc(text, size);
 				strncat(text, line, size);