feat: added malloc in the example

Author: Zffu

examples/sample.qf

@@ -1,10 +1,13 @@
 static staticstr bobby = "\nHellossssss %d"
 
 shadowfunc printf(ptr str_ptr) si32
+shadowfunc malloc(un64 sz) ptr
 
 func main() si32 {
 	var si32 test = 65_si32
 
+	malloc(544_un64)
+
 	printf(bobby, test)
 
 	ret 0_si32

ir/src/conv/val.rs

@@ -29,7 +29,11 @@ pub fn parse_ir_value<'a>(lctx: Option<&IRLocalContext>, ctx: &IRContext, node:
 				return Err(PositionlessError::new("Invalid type storage! integer type indicator not found!"));
 			}
 
-			return Ok(IRValueRef::from_val(IRValue::from_signed(ctx, t.unwrap(), *v as i128)?));
+			if t.as_ref().unwrap().is_signed() {
+				return Ok(IRValueRef::from_val(IRValue::from_signed(ctx, t.as_ref().unwrap().clone(), *v as i128)?));
+			} else {
+				return Ok(IRValueRef::from_val(IRValue::from_unsigned(ctx, t.as_ref().unwrap().clone(), *v as u128)?));
+			}		
 		},
 
 		ASTTreeNode::StringLit(v) => {