vc4: Fix resource leak in register allocation failure path.

CID 1394322

Signed-off-by: Mun Gwan-gyeong <elongbug@gmail.com>

src/gallium/drivers/vc4/vc4_register_allocate.c

@@ -354,6 +354,7 @@ vc4_register_allocate(struct vc4_context *vc4, struct vc4_compile *c)
                          */
                         if (c->fs_threaded) {
                                 c->failed = true;
+                                free(temp_registers);
                                 return NULL;
                         }
 
@@ -383,6 +384,7 @@ vc4_register_allocate(struct vc4_context *vc4, struct vc4_compile *c)
                 }
 
                 c->failed = true;
+                free(temp_registers);
                 return NULL;
         }