Check array size for overflow.

Since ZScript is a 32 bit VM, the largest safe value for an array's physical size is 2GB. Any larger value will be destroyed by the compiler which relies on signed 32 bit values too much.

src/common/scripting/frontend/zcc_compile.cpp

@@ -2286,6 +2286,11 @@ PType *ZCCCompiler::ResolveArraySize(PType *baseType, ZCC_Expression *arraysize,
 			Error(arraysize, "Array size must be positive");
 			return TypeError;
 		}
+		if (uint64_t(size) * baseType->Size > 0x7fffffff)
+		{
+			Error(arraysize, "Array size overflow. Total size must be less than 2GB");
+			return TypeError;
+		}
 		baseType = NewArray(baseType, size);
 	}