Fix makefile and change some stuff in client

Makefile

@@ -1,7 +1,7 @@
 # Compiler
 CC := gcc
 # Compiler flags
-CFLAGS := -Wall -Wextra -Werror -Ilibs -fsanitize=address
+CFLAGS := -Wall -Wextra -Ilibs
 
 # Directories
 SRCDIR := src

src/client/client.c

@@ -106,7 +106,7 @@ int main(int argc, char *argv[]) {
 		}
 	}
 
-    int receiverUidInt = atoi(receiverUid);
+    int receiverUidInt = atoi("1003");
 
     send_message(receiverUidInt,groupFlag);