Fix a bug where the patcher mistakes local names for hooks

[pants64DS]

When compiling the following ASM patch, GCC emits _ZZ13hook_0200da08vE1a as a symbol for variable a.

extern "C" void Test(int* a);
asm("Test:\n bx lr");

void hook_0200da08()
{
	static int a = 0;
	Test(&a);
}

Before this fix, the patcher mistook that for a hook and tried to make a branch from the hook address to the variable. Using a lambda in a hook function could also lead to the same problem.